docs(docs): add vicinae documentation and update references

docs/shell/scripts.mdx

@@ -52,6 +52,7 @@ Several scripts below also exist as fish functions of the same name (`ai`, `c2p`
 | [`pj`](#pj) | bash | Task runner across every project task source, on a tv cable |
 | [`projects-sync`](#projects-sync) | bash | Symlink every `~/Code` repo into `~/Projects` |
 | [`pj-palette`](#pj-palette) | bash | pj's tasks plus quick actions as a tmux-palette source |
+| [`tmux-sessions`](#tmux-sessions) | bash | Session/window/zoxide switcher as a tmux-palette source |
 | [`yazi-nvim-open`](#yazi-nvim-open) | sh | yazi opener that targets the host Neovim |
 
 ## ai
@@ -404,6 +405,35 @@ The project root is the git toplevel, else the pane's directory.
 
 **Needs:** `pj` and its dependencies, `jq`, tmux.
 
+## tmux-sessions
+
+```sh
+tmux-sessions
+tmux-sessions --new QUERY
+tmux-sessions --dir DIR
+```
+
+The source of the **Sessions** [tmux command palette](/terminal/tmux#command-palette) (`palettes/sessions.json`), which replaced tmux-sessionx. Open it with tmux `prefix o`, Ghostty <kbd>ctrl+shift+o</kbd> or <kbd>super+enter</kbd>, or the "Sessions" item in the main palette.
+
+With no arguments it prints palette items as JSON, grouped by category:
+
+| Group | Items | Action |
+| --- | --- | --- |
+| Sessions | Every session but the current one, the client's last session first. Attached ones have a green icon | `switch-client` |
+| Windows | Every window of every session, as `<session>:<index> · <cwd>` | `switch-client` to that window |
+| Zoxide | `zoxide query -l` | `--dir` |
+| Config | Directories in `~/.config` that zoxide does not list | `--dir` |
+| Rename | One per session | `command-prompt` prefilled with the name |
+| Kill | One per session except the current one | `kill-session` |
+
+pj-palette's background task sessions (`@pj_task`) are left out. Sessions are targeted by id, since names may contain `:`.
+
+**`--new QUERY`** is the palette's `query` item, the typed text listed after the matches. It switches to the session named QUERY if there is one. Otherwise it starts a session named QUERY in QUERY itself if that is a directory (via `--dir`), else in `zoxide query QUERY`'s match (QUERY's words are separate keywords), else in tmux's default directory. Typed text that matches nothing therefore lands on the `query` item, the same as sessionx's zoxide mode.
+
+**`--dir DIR`** switches to, or starts in DIR, the session named after DIR's basename with dots removed (sessionx's rule).
+
+**Needs:** tmux, `jq`, `zoxide`.
+
 ## yazi-nvim-open
 
 ```sh