TechDocs: browse metadata (#2682)

* feat(techdocs): TechDocsPageWrapper to take in labels prop and use TechDocsHeader component

* feat(techdocs): new TechDocsHeader component as wrapper around Header from core

* feat(techdocs): TechDocsPage metadata

* feat(techdocs): TechDocsMetadata class responsible for reading metadata from generated techdocs metadata json file

* fix(techdocs): delete TechDocsPageWrapper component

* fix(app-config): delete /docs from request url

* feat(techdocs): TechDocsHeader with labels to browse metadata

* fix(techdocs): move metadata to backend plugin

* feat(techdocs-backend): introduce two new metadata routes

* feat(techdocs): new techdocs api to be responsible to request metadata from backend

* feat(techdocs): register new api for plugin

* fix(techdocs): reader to take in onReady prop

* fix(techdocs): TechDocsHome component to use its own header

* fix(techdocs): TechDocsPage responsible to get metadata and pass it down to the TechDocsHeader

* fix(techdocs): component tests for both TechDocsHeader and TechDocsPage

* fix(techdocs): adjust api to use /docs in url since it was taken away in requestURL

* fix(tests): move assertion into act

* fix(techdocs): rename TechDocsHeader to TechDocsPageHeader

* fix(techdocs): rename TechDocsHeader to TechDocsPageHeader

* fix(techdocs-backend): add some logs

* Update plugins/techdocs/src/reader/components/TechDocsPage.test.tsx

* delete unused import

app-config.yaml

@@ -42,7 +42,7 @@ organization:
 
 techdocs:
   storageUrl: http://localhost:7000/api/techdocs/static/docs
-  requestUrl: http://localhost:7000/api/techdocs/docs
+  requestUrl: http://localhost:7000/api/techdocs
   generators:
     techdocs: 'docker'