Docs: Plugins doc reorganization, part 1 (#69864)

* Initial commit

* Prettier fixes

* Doc-validator fixes part 1

* Doc-validator fixes part 2

* More doc-validator fixes

* More doc-validator fixes

* Test

* link test

* Linnk test

* Link test

* More fixes

* More fixes

* Doc-validator fixes

* Doc-validator fixes

* fix broken link

* Fix

* Testing

* Doc fixes

* Link fixes

* Fix links

* Update docs/sources/developers/plugins/create-a-grafana-plugin/_index.md

Co-authored-by: David Harris <david.harris@grafana.com>

* Testing

* Testing

* Testing

* Testing

* Doc-validator fixes

* Doc-validator fixes

* Doc-validator fixes

* Fix broken links for plugins reorganization project

* Prettier fixes

* Prettier fixes

* Incorporate reviewer feedback

* Link fixes

* Link fixes

* Link fixes

* Link fix

* Deleted space

* Codeowners fix

* Change grafana.com links to absolute URLs for Hugo

---------

Co-authored-by: David Harris <david.harris@grafana.com>

docs/sources/developers/plugins/migration-guide/_index.md

@@ -1,13 +1,15 @@
 ---
+title: Migrate a plugin
 aliases:
   - ../../plugins/developing/migration-guide
+description: A guide for migrating and updating a Grafana plugin.
 keywords:
   - grafana
   - plugins
   - migration
   - plugin
   - documentation
-title: Migration guides
+weight: 500
 ---
 
 <script>
@@ -34,7 +36,7 @@ title: Migration guides
 })();
 </script>
 
-# Plugin migration guide
+# Migrate a plugin
 
 The following guides help you identify the steps required to update a plugin following changes between versions of Grafana.