## Summary
Closes https://github.com/elastic/kibana/issues/66716
Improves code editors in Anomaly detection, Data frame analytics and
Transform wizards with autocomplete, data types validation and inline
documentation from elasticsearch specification.
Adds a package with JSON schemas extracted from the [openapi output of
elasticsearch-specification](https://github.com/elastic/elasticsearch-specification/tree/main/output/openapi).
Schema file is generated per editor/endpoint, keeping only relevant
components.
To test the script locally, execute
```
yarn run jsonSchema
```
from `/x-pack/packages/ml/json_schemas`.
By default it assumes that your `elasticsearch-specification` folder is
located next to the `kibana` repo, but you can also provide a path to
`openapi` file as a parameter, e.g. `yarn run jsonSchema
/Users/my_user/dev/elasticsearch-specification/output/openapi/elasticsearch-serverless-openapi.json`
#### How JSON files are served
JSON files are asynchronously imported at the React component level and
passed to the `CodeEditor` instances on mount.
Initially I tried different approaches to take advantage of CDN, but
unfortunately it didn't work out:
##### Using static assets
I made an attempt to retrieve a URL to the JSON schema file as a static
asset using Kibana service
```typescript
const schemaJsonAsset = http?.staticAssets.getPluginAssetHref('my_schema.json') ?? '';
```
and passing it as part of the schema definition, but the browser was
blocking a request 🤔
##### Using raw loader
Approach with a raw loader also didn't succeed.
```typescript
import mySchema from '!!raw-loader!./my_schema.json';
```
<details>
<summary>See error </summary>
```
ERROR in
./public/app/sections/create_transform/components/advanced_pivot_editor/my_schema.json
(/Users/dimaarnautov/Repos/kibana/node_modules/raw-loader/dist/cjs.js!./public/app/sections/create_transform/components/advanced_pivot_editor/my_schema.json)
│ Module parse failed: Unexpected token 'e', "export def"... is not
valid JSON while parsing 'export default "{\n \"type\": \"object\'
│ File was processed with these loaders:
│ * ../../../node_modules/raw-loader/dist/cjs.js
│ You may need an additional loader to handle the result of these
loaders.
│ SyntaxError: Unexpected token 'e', "export def"... is not valid JSON
while parsing 'export default "{\n \"type\": \"object\'
│ at JSON.parse (<anonymous>)
│ at parseJson
(/Users/dimaarnautov/Repos/kibana/node_modules/json-parse-better-errors/index.js:7:17)
│ at JsonParser.parse
(/Users/dimaarnautov/Repos/kibana/node_modules/webpack/lib/JsonParser.js:16:16)
│ at
/Users/dimaarnautov/Repos/kibana/node_modules/webpack/lib/NormalModule.js:482:32
│ at
/Users/dimaarnautov/Repos/kibana/node_modules/webpack/lib/NormalModule.js:358:12
│ at
/Users/dimaarnautov/Repos/kibana/node_modules/loader-runner/lib/LoaderRunner.js:373:3
│ at iterateNormalLoaders
(/Users/dimaarnautov/Repos/kibana/node_modules/loader-runner/lib/LoaderRunner.js:214:10)
│ at iterateNormalLoaders
(/Users/dimaarnautov/Repos/kibana/node_modules/loader-runner/lib/LoaderRunner.js:221:10)
│ at
/Users/dimaarnautov/Repos/kibana/node_modules/loader-runner/lib/LoaderRunner.js:236:3
│ at runSyncOrAsync
(/Users/dimaarnautov/Repos/kibana/node_modules/loader-runner/lib/LoaderRunner.js:130:11)
│ at iterateNormalLoaders
(/Users/dimaarnautov/Repos/kibana/node_modules/loader-runner/lib/LoaderRunner.js:232:2)
│ at
/Users/dimaarnautov/Repos/kibana/node_modules/loader-runner/lib/LoaderRunner.js:205:4
│ at
/Users/dimaarnautov/Repos/kibana/node_modules/webpack/node_modules/enhanced-resolve/lib/CachedInputFileSystem.js:85:15
│ at processTicksAndRejections (node:internal/process/task_queues:77:11)
```
</details>
### Checklist
- [ ] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
4c3afc5f42