* compile core files as isolated modules
* fix export problems for isolated modules
* apply changes to kbn-test as core imports from it
* fix some exports
* fix lint errors
* update new exports
* fix eslint error
* expand export * where it is possible
* update docs
* update docs
* fix eslint error
* update api_docs from gitignore
* api doc files
* Update api_welcome.mdx
* Pretty print json
* Add new lines and extra frontmatter to warn github viewers
* update api_docs with new lines and frontmatter
* Remove all apis tagged @internal and add tests
* Update docs with all internal APIs removed
* fix typescript error in test fixtures
* Update core.json
Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>