[Rules migration] Implement workflow tour - Setup Guide (#11384) (#207242)

## Summary

[Internal link](https://github.com/elastic/security-team/issues/10820)
to the feature details

This PR adds the SIEM Migration setup tour guide on the main landing
page. [Figma
link](https://www.figma.com/design/BD9GZZz6y8pfSbubAt5H2W/%5B8.18%5D-GenAI-Powered-SIEM-Migration%3A-Rule-translation?node-id=2652-244526&t=WmkBy29xrzl5mN7G-4)


https://github.com/user-attachments/assets/680e3bb6-a0af-43dc-99f8-30e32badf367

Delete `securitySolution.siemMigrations.setupGuide.v8.18` in the local
storage to reset the tour.

> [!NOTE]  
> This feature needs `siemMigrationsEnabled` experimental flag enabled
to work.

x-pack/solutions/security/plugins/security_solution/common/constants.ts

@@ -423,6 +423,7 @@ export const RULES_TABLE_MAX_PAGE_SIZE = 100;
 export const NEW_FEATURES_TOUR_STORAGE_KEYS = {
   RULE_MANAGEMENT_PAGE: 'securitySolution.rulesManagementPage.newFeaturesTour.v8.13',
   TIMELINES: 'securitySolution.security.timelineFlyoutHeader.saveTimelineTour',
+  SIEM_MAIN_LANDING_PAGE: 'securitySolution.siemMigrations.setupGuide.v8.18',
 };
 
 export const RULE_DETAILS_EXECUTION_LOG_TABLE_SHOW_METRIC_COLUMNS_STORAGE_KEY =

x-pack/solutions/security/plugins/security_solution/public/onboarding/components/onboarding_header/onboarding_header_topic_selector.tsx

@@ -7,9 +7,22 @@
 
 import React, { useMemo } from 'react';
 import { EuiButtonGroup } from '@elastic/eui';
-import type { OnboardingTopicId } from '../../constants';
+import { OnboardingTopicId } from '../../constants';
 import { useOnboardingContext } from '../onboarding_context';
 import { useTopic } from '../hooks/use_topic_id';
+import type { TopicConfig } from '../../types';
+import { SiemMigrationSetupTour } from '../../../siem_migrations/rules/components/tours/setup_guide';
+
+const getLabel = (topicConfig: TopicConfig) => {
+  if (topicConfig.id === OnboardingTopicId.siemMigrations) {
+    return (
+      <SiemMigrationSetupTour>
+        <>{topicConfig.title}</>
+      </SiemMigrationSetupTour>
+    );
+  }
+  return topicConfig.title;
+};
 
 export const OnboardingHeaderTopicSelector = React.memo(() => {
   const { config } = useOnboardingContext();
@@ -19,7 +32,7 @@ export const OnboardingHeaderTopicSelector = React.memo(() => {
     () =>
       [...config.values()].map((topicConfig) => ({
         id: topicConfig.id,
-        label: topicConfig.title,
+        label: getLabel(topicConfig),
       })),
     [config]
   );

x-pack/solutions/security/plugins/security_solution/public/siem_migrations/rules/components/tours/setup_guide/index.tsx

@@ -0,0 +1,79 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import React, { useCallback, useEffect, useMemo, useState } from 'react';
+import { EuiButtonEmpty, EuiTourStep } from '@elastic/eui';
+import { NEW_FEATURES_TOUR_STORAGE_KEYS } from '../../../../../../common/constants';
+import { useKibana } from '../../../../../common/lib/kibana';
+import * as i18n from './translations';
+
+const tourConfig = {
+  currentTourStep: 1,
+  isTourActive: true,
+  tourPopoverWidth: 360,
+};
+
+export interface SetupTourProps {
+  children: React.ReactElement;
+}
+
+export const SiemMigrationSetupTour: React.FC<SetupTourProps> = React.memo(({ children }) => {
+  const { siemMigrations, storage } = useKibana().services;
+
+  const [tourState, setTourState] = useState(() => {
+    const restoredTourState = storage.get(NEW_FEATURES_TOUR_STORAGE_KEYS.SIEM_MAIN_LANDING_PAGE);
+    if (restoredTourState != null) {
+      return restoredTourState;
+    }
+    return tourConfig;
+  });
+
+  const onTourFinished = useCallback(() => {
+    setTourState({
+      ...tourState,
+      isTourActive: false,
+    });
+  }, [tourState]);
+
+  useEffect(() => {
+    storage.set(NEW_FEATURES_TOUR_STORAGE_KEYS.SIEM_MAIN_LANDING_PAGE, tourState);
+  }, [tourState, storage]);
+
+  const [tourDelayElapsed, setTourDelayElapsed] = useState(false);
+
+  useEffect(() => {
+    // visible EuiTourStep anchors don't follow the button when the layout changes
+    const timeout = setTimeout(() => setTourDelayElapsed(true), 1000);
+    return () => clearTimeout(timeout);
+  }, []);
+
+  const showTour = useMemo(() => {
+    return siemMigrations.rules.isAvailable() && tourState.isTourActive && tourDelayElapsed;
+  }, [siemMigrations.rules, tourDelayElapsed, tourState.isTourActive]);
+
+  return (
+    <EuiTourStep
+      anchorPosition="downCenter"
+      content={i18n.SETUP_SIEM_MIGRATION_TOUR_CONTENT}
+      isStepOpen={showTour}
+      maxWidth={tourState.tourPopoverWidth}
+      onFinish={onTourFinished}
+      step={1}
+      stepsTotal={1}
+      subtitle={i18n.SETUP_SIEM_MIGRATION_TOUR_SUBTITLE}
+      title={i18n.SETUP_SIEM_MIGRATION_TOUR_TITLE}
+      footerAction={
+        <EuiButtonEmpty size="xs" color="text" flush="right" onClick={onTourFinished}>
+          {i18n.FINISH_TOUR_BUTTON}
+        </EuiButtonEmpty>
+      }
+    >
+      {children}
+    </EuiTourStep>
+  );
+});
+SiemMigrationSetupTour.displayName = 'SiemMigrationSetupTour';

x-pack/solutions/security/plugins/security_solution/public/siem_migrations/rules/components/tours/setup_guide/translations.ts

@@ -0,0 +1,37 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { i18n } from '@kbn/i18n';
+
+export const SETUP_SIEM_MIGRATION_TOUR_TITLE = i18n.translate(
+  'xpack.securitySolution.siemMigrations.rules.tour.setupSiemMigrationTourTitle',
+  {
+    defaultMessage: 'Streamlined SIEM migration',
+  }
+);
+
+export const SETUP_SIEM_MIGRATION_TOUR_SUBTITLE = i18n.translate(
+  'xpack.securitySolution.siemMigrations.rules.tour.setupSiemMigrationTourTitle',
+  {
+    defaultMessage: 'New onboarding guide!',
+  }
+);
+
+export const SETUP_SIEM_MIGRATION_TOUR_CONTENT = i18n.translate(
+  'xpack.securitySolution.siemMigrations.rules.tour.setupSiemMigrationTourContent',
+  {
+    defaultMessage:
+      'This is a step-by-step guide to quickly import your SIEM rules, assets, and data to Elastic Security. Powered by AI.',
+  }
+);
+
+export const FINISH_TOUR_BUTTON = i18n.translate(
+  'xpack.securitySolution.siemMigrations.rules.tour.finishButton',
+  {
+    defaultMessage: 'OK',
+  }
+);