docs(docs): add mandible-pick script documentation and update tmux palette entries

docs/shell/scripts.mdx

@@ -44,6 +44,7 @@ Several scripts below also exist as fish functions of the same name (`ai`, `c2p`
 | [`kitty-day-save`](#kitty-day-save) | bash | Save kitty's daily session right before shutdown/reboot |
 | [`launch_omp_livediff_overlay`](#launch_omp_livediff_overlay) | sh | omp overlay plus a livediff split in kitty |
 | [`lc-elir`](#lc-elir) | sh | Run `/leetcode-eli5` via omp on picked solutions |
+| [`mandible-pick`](#mandible-pick) | bash | fzf-pick a command, then open it in mandible |
 | [`mdcp`](#mdcp) | sh | Fetch a URL as Markdown, copy it, preview it |
 | [`mdp`](#mdp) | sh | fzf Markdown picker with mdfried preview |
 | [`mtime-sort`](#mtime-sort) | sh + perl | Sort path lines newest-first by mtime |
@@ -222,6 +223,18 @@ Finds numbered LeetCode solution files (`^\d+\..+\.(js|ts)$`, for example `1365.
 
 **Needs:** `fd`, `fzf`, `bat`, `omp`, and the `/leetcode-eli5` omp command.
 
+## mandible-pick
+
+```sh
+mandible-pick
+```
+
+`mandible` (installed with cargo, `~/.cargo/bin`) needs a tool to open, so this asks for one first. fzf lists the executables installed in the `PATH` directories, without shell builtins, keywords, or aliases. <kbd>enter</kbd> opens the highlighted command. If the query contains a space (`git remote add`) or matches nothing, <kbd>enter</kbd> uses it exactly as typed, so mandible opens at that subcommand path. Then it `exec`s `mandible <tool> [subcommand…]`. <kbd>esc</kbd> exits quietly. The command list is built with a bash loop rather than GNU `find -printf`, so it also works on macOS.
+
+**Used by:** the tmux-palette **mandible** item (alias `man`), which runs it in a popup. See [tmux](/terminal/tmux#command-palette).
+
+**Needs:** `mandible`, `fzf` 0.51+ (`--with-shell`, `transform`, `accept-or-print-query`).
+
 ## mdcp
 
 ```sh