[RFE] Add file watchers to collection path to avoid reload in the extension

[ganeshrn]

Problem

Currently if new collections are created in standard path and plugins added the extension is required to be reloaded every time for the new collection to be displayed in auto-complete.

Solution

Add file watcher (using vscode library) to watch for changes in the collection path and re create the in memory structure for the documents when new collections/plugins are installed or exiting plugins are edited.

Alternatives

Alternative is to restart the extension which is not a good user experience.

Additional context

No response