Closes#1948
Plugins receive debounced batches of files created, changed and removed outside the editor in open projects, as SDK `Event::FilesChanged` (delivered through `other("files-changed", …)`, so released WIT is unchanged), under the `events` capability and the plugin's path filters. Activation on these events requires API 1.3. Batches are coalesced per plugin through its actor, survive cancellation without losing deltas, and are dropped when the project or host shuts down.
Co-authored-by: arnaud-ritti <[email protected]>
Closes#1949. Plugin API 1.3: views from several plugins can share one tool window (shown as tabs) and a view can declare a visibility condition (e.g. only when the project contains a file, or for the active file) so it appears only when it applies. Additive within API 1.x, with a fixture plugin, regression tests and docs.
Co-authored-by: arnaud-ritti <[email protected]>