v0.1.0

Added

• Shared drafts of Symfony forms: editors of the same record, or of the same
  new-record page through its invitation link, share one durable draft of
  its text, rich-text, choice and collection fields. A journal on MariaDB or
  MySQL orders every change under a per-draft named lock; pages replay it
  over CSRF-protected requests that recheck the user's signed field grant.
• A state bar above each shared form (saved, unsaved, synchronizing,
  interrupted, changed, in conflict, reset, created, refused, full, expired,
  incompatible, unavailable), Discard with confirmation, an invitation link
  for new records, and a review of the differences with a record saved
  elsewhere, where editors keep the draft or use the saved record.
• Save through the form's own validation and persistence, holding the
  draft's lock from its revision check to the response; a save overtaken by
  a peer's edit or by another save returns to the form with a warning.
• A CKEditor 5 plugin, Collaborate, that shares the editor's model
  operations and lets CKEditor transform concurrent ones, undo included, and
  keeps a Markdown source mode in step; sessionFor(), editorConfiguration(),
  editorReady(), editorFailed() and addRowInitializer() for the host's
  editors and collection widgets.
• Shared cursors and presence on any page with the collaboration layer:
  peers' pointers with their platform's shapes, carets and selections in
  text fields and rich text, the field each peer is in, and header avatars
  with a +N counter.
• Saved-list and saved-detail refresh after writes elsewhere, limited to the
  pages whose entity the write can alter.
• One Mercure subscription per page for all of the above, with a subscriber
  JWT minted for the topics the page's signed grants admit, renewed in the
  background.
• An EasyAdmin adapter: edit and new CRUD pages share drafts, saves go
  through EasyAdmin's persistence, and index and detail pages refresh.
• Per-locale draft fields for Gedmo translatable properties.
• collaborate:purge, which deletes idle drafts.
• Extension points: CollaboratorProviderInterface (who a user is),
  DraftAccessCheckerInterface (what they may edit) and
  FormContextInterface (which record a page edits).
• English and French translations.