chore: simplify plugin readmes, changelogs and manifest descriptions

plugins/session-sharing/CHANGELOG.md

@@ -2,19 +2,6 @@
 
 ## 1.0.0
 
-Bundled with Termix 2.9.0.
+First release, bundled with Termix 2.9.0.
 
-- Session sharing and collaboration rooms moved out of core and now serve
-  under `/plugin-api/session-sharing`. The old `/session-sharing` and
-  `/collab` routes are gone; guest links (`?view=shared` and
-  `?view=collab-guest`) keep working.
-- Owns its data: core's `session_shares`, `session_share_participants`,
-  `collab_rooms` and `collab_room_members` tables are renamed into this
-  plugin on first activation.
-- The instance-wide sharing switch and each host's sharing switch moved into
-  this plugin's admin and host settings.
-- New `session-sharing.use` permission, given to the admin and user roles.
-- Provides `sessions.sharing` and the `sessions.sharing.guests` registry entry,
-  which the terminal uses for member and guest joins.
-- The share button moved from the tab bar into the terminal and remote
-  desktop toolbars.
+Share a live terminal or remote desktop session by link or with another user, read-only or with input. Collaboration rooms let a presenter show sessions to a group.