Allow to define and update a defaultPath for applications (#64498) (#64867)

* add defaultPath to `AppBase` and use it in `navigateToApp`

* add removeSlashes util

* adapt `toNavLink` to handle defaultPath

* update generated doc

* codestyle

* add FTR test

* address comments

* add tests

docs/development/core/public/kibana-plugin-core-public.appbase.defaultpath.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-public](./kibana-plugin-core-public.md) &gt; [AppBase](./kibana-plugin-core-public.appbase.md) &gt; [defaultPath](./kibana-plugin-core-public.appbase.defaultpath.md)
+
+## AppBase.defaultPath property
+
+Allow to define the default path a user should be directed to when navigating to the app. When defined, this value will be used as a default for the `path` option when calling [navigateToApp](./kibana-plugin-core-public.applicationstart.navigatetoapp.md)<!-- -->\`<!-- -->, and will also be appended to the [application navLink](./kibana-plugin-core-public.chromenavlink.md) in the navigation bar.
+
+<b>Signature:</b>
+
+```typescript
+defaultPath?: string;
+```

docs/development/core/public/kibana-plugin-core-public.appbase.md

@@ -18,6 +18,7 @@ export interface AppBase
 |  [capabilities](./kibana-plugin-core-public.appbase.capabilities.md) | <code>Partial&lt;Capabilities&gt;</code> | Custom capabilities defined by the app. |
 |  [category](./kibana-plugin-core-public.appbase.category.md) | <code>AppCategory</code> | The category definition of the product See [AppCategory](./kibana-plugin-core-public.appcategory.md) See DEFAULT\_APP\_CATEGORIES for more reference |
 |  [chromeless](./kibana-plugin-core-public.appbase.chromeless.md) | <code>boolean</code> | Hide the UI chrome when the application is mounted. Defaults to <code>false</code>. Takes precedence over chrome service visibility settings. |
+|  [defaultPath](./kibana-plugin-core-public.appbase.defaultpath.md) | <code>string</code> | Allow to define the default path a user should be directed to when navigating to the app. When defined, this value will be used as a default for the <code>path</code> option when calling [navigateToApp](./kibana-plugin-core-public.applicationstart.navigatetoapp.md)<!-- -->\`<!-- -->, and will also be appended to the [application navLink](./kibana-plugin-core-public.chromenavlink.md) in the navigation bar. |
 |  [euiIconType](./kibana-plugin-core-public.appbase.euiicontype.md) | <code>string</code> | A EUI iconType that will be used for the app's icon. This icon takes precendence over the <code>icon</code> property. |
 |  [icon](./kibana-plugin-core-public.appbase.icon.md) | <code>string</code> | A URL to an image file used as an icon. Used as a fallback if <code>euiIconType</code> is not provided. |
 |  [id](./kibana-plugin-core-public.appbase.id.md) | <code>string</code> | The unique identifier of the application |

docs/development/core/public/kibana-plugin-core-public.appupdatablefields.md

@@ -9,5 +9,5 @@ Defines the list of fields that can be updated via an [AppUpdater](./kibana-plug
 <b>Signature:</b>
 
 ```typescript
-export declare type AppUpdatableFields = Pick<AppBase, 'status' | 'navLinkStatus' | 'tooltip'>;
+export declare type AppUpdatableFields = Pick<AppBase, 'status' | 'navLinkStatus' | 'tooltip' | 'defaultPath'>;
 ```

docs/development/core/public/kibana-plugin-core-public.chromenavlink.md

@@ -29,5 +29,5 @@ export interface ChromeNavLink
 |  [subUrlBase](./kibana-plugin-core-public.chromenavlink.suburlbase.md) | <code>string</code> | A url base that legacy apps can set to match deep URLs to an application. |
 |  [title](./kibana-plugin-core-public.chromenavlink.title.md) | <code>string</code> | The title of the application. |
 |  [tooltip](./kibana-plugin-core-public.chromenavlink.tooltip.md) | <code>string</code> | A tooltip shown when hovering over an app link. |
-|  [url](./kibana-plugin-core-public.chromenavlink.url.md) | <code>string</code> | A url that legacy apps can set to deep link into their applications. |
+|  [url](./kibana-plugin-core-public.chromenavlink.url.md) | <code>string</code> | The route used to open the [default path](./kibana-plugin-core-public.appbase.defaultpath.md) of an application. If unset, <code>baseUrl</code> will be used instead. |
 

docs/development/core/public/kibana-plugin-core-public.chromenavlink.url.md

@@ -4,11 +4,7 @@
 
 ## ChromeNavLink.url property
 
-> Warning: This API is now obsolete.
-> 
-> 
-
-A url that legacy apps can set to deep link into their applications.
+The route used to open the [default path](./kibana-plugin-core-public.appbase.defaultpath.md) of an application. If unset, `baseUrl` will be used instead.
 
 <b>Signature:</b>