feat: doc tags (same as blog tags) (#3646)

* [v2] tags to doc, same as tags to blog - [IN PROGRESS]

- Addition of plugin-content-docs

- Addition of DocTagsListPage in `docusaurus-theme-classic`

! Error exists for this commit towards the theme aspect and help required.

Commit towards #3434

* docs: make tags list page work

* temp: disable onBrokenLinks

* theme bootstrap: create DocTagsListPage

* DocTagsPage added and functionality too

- individual doc tag page added to show docs for that specific tag

* Added all Docs Tags Link

* add some shared tag utils

* move tag tests to _dogfooding

* fix type

* fix some tests

* fix blog test

* refactor blog post tags handling

* better yaml tag examples

* better dogfood md files

* refactor and factorize theme tag components

* finish DocTagDocListPage

* Extract DocItemFooter + add inline tag list

* minor fix

* better typings

* fix versions.test.ts tests

* add tests for doc tags

* fix tests

* test toTagDocListProp

* move shared theme code to tagUtils

* Add new theme translation keys

* move common theme code to tagUtils + add tests

* update-code-translations should handle theme-common

* update french translation

* revert add translation

* fix pluralization problem in theme.docs.tagDocListPageTitle

* add theme component configuration options

* add more tags tests

* add documentation for docs tagging

Co-authored-by: slorber <lorber.sebastien@gmail.com>

packages/docusaurus-plugin-content-docs/src/docs.ts

@@ -15,6 +15,7 @@ import {
   parseMarkdownString,
   posixPath,
   Globby,
+  normalizeFrontMatterTags,
 } from '@docusaurus/utils';
 import {LoadContext} from '@docusaurus/types';
 
@@ -252,6 +253,7 @@ function doProcessDocMetadata({
     slug: docSlug,
     permalink,
     editUrl: customEditURL !== undefined ? customEditURL : getDocEditUrl(),
+    tags: normalizeFrontMatterTags(versionMetadata.tagsPath, frontMatter.tags),
     version: versionMetadata.versionName,
     lastUpdatedBy: lastUpdate.lastUpdatedBy,
     lastUpdatedAt: lastUpdate.lastUpdatedAt,