* POC of contextual search dynamic filters
* fix useSearchTags bugs
* contextual search should use preferred version (persisted in storage)
* Contextual search: make system decoupled from algolia + wire proper meta tags and facet filters
* rework doc tag + minor refactorings
* update snapshots
* polish contextual search
* add Algolia validateThemeConfig tests
* We should create an alias for searching last version of docs on DocSearch/Algolia, so that on new version publish, search still works even if new version is not already indexed (https://github.com/facebook/docusaurus/issues/3391)
* commit missing snapshot
* update after algolia changes
* put back facetFilters: [`version:${versions[0]}`] until latest facet is indexed
* add new docs versioning options
* Add some tests for new versioning options
* Add some docs for version configurations
* try to fix broken link detection after /docs/ root paths have been removed on deploy previews
* improve dev/deploypreview versioning configurations
* disable custom current version path, as it produces broken links
* readVersionDocs should not be order sensitive
* fix versions page according to versioning config
* fix versions page according to versioning config
