chore: rework plugin readmes, json changelogs and standalone repo setup

plugins/ssh-terminal/CONTRIBUTING.md

@@ -0,0 +1,37 @@
+# Contributing to SSH Terminal
+
+## Development
+
+```bash
+npm run build      # build into dist/
+npm run test       # run this plugin's tests
+npm run typecheck  # type-check this plugin
+npm run validate   # check manifest.json
+npm run format     # format the code with Prettier
+```
+
+## Settings
+
+### Admin
+
+- **Keep sessions after disconnect and Terminal Session Persistence:** keep a disconnected terminal alive, and for how long
+- **Command History:** allow command history at all
+- **Touch Input:** options for using the terminal on a touch screen
+- **Image Storage:** where pasted and uploaded images are kept, and how many and how large
+
+### User
+
+- **Command Autocomplete:** show suggestions from your history while you type
+
+### Host
+
+- **Enable Terminal:** offer an SSH terminal for this host
+- **Enable Terminal Toolbar:** show the toolbar for this host
+- **Command History:** record commands run on this host
+- **Appearance:** theme, colors, font, cursor and syntax highlighting
+- **Behavior:** Auto-Tmux, Auto-Mosh, local echo, auto reconnect, password and sudo auto-fill, and scrollback size
+
+## Permissions
+
+- `ssh-terminal.sessions`: let other features, like session sharing and recording, reach your live terminal sessions. Admins and users have it by default.
+- `ssh-terminal.history`: let other features, like the AI assistant, read your command history. Admins and users have it by default.