Shell: Tab completes every word of a command, and * and ? stand for several files (#67)

Tab used to complete a command's first word only. It now follows the help
text word by word: `lora st` gives `lora status`, `gnss track ` lists
`start  stop`. The words are read from the help text as written, so a new
command completes with no table to keep; the Shell's own words are added in
the same notation.

`*` and `?` in the last part of a path, for ls, du, rm, cp and mv, from the
Shell and both consoles. The command runs once for each name matched, lined
up and run by the main loop as each finishes; `cancel` empties the line-up.
64 matches at most, refused whole past that. In the Shell, rm with a pattern
asks once, with the count.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT

site/content/guide/shell.md

@@ -23,7 +23,7 @@ Type a command and press <kbd>Enter</kbd>. `help` lists them all; the [command r
 | `update check` | Whether a newer release exists |
 | `lora status` | What the radio is set to and what it has heard |
 
-- <kbd>Tab</kbd> **completes** what you are typing: the command's name first, then **a path on the SD card**. `ls /no` and Tab gives `ls /notes/`; Tab again goes on inside the folder. If several names fit, it completes as far as they agree and lists them. You can type the name in any case, and after a file command you can leave out the first slash: `cat no` and Tab gives `cat /notes/`. A name with a space in it isn't completed.
+- <kbd>Tab</kbd> **completes** what you are typing: the command, word by word (`lora st` gives `lora status`, and `gnss track ` with Tab lists `start  stop`), then **a path on the SD card**. `ls /no` and Tab gives `ls /notes/`; Tab again goes on inside the folder. If several names fit, it completes as far as they agree and lists them. You can type the name in any case, and after a file command you can leave out the first slash: `cat no` and Tab gives `cat /notes/`. A name with a space in it isn't completed.
 - <kbd>Fn</kbd> with up and down brings back **lines you typed before**.
 - <kbd>Alt</kbd> with up and down **scrolls back** through what was printed.
 - `clear` empties the screen, and `quit` (or Back) leaves.
@@ -54,6 +54,20 @@ The capital is the difference: every command is in small letters, every App star
 | `rm -r /captures/old` | Removed at once if it is empty. If not, asks first |
 | `rm -rf /captures/old` | Removed with everything in it, without asking |
 
+## Several files at once
+
+`*` stands for any run of characters in a name and `?` for exactly one, in `ls`, `du`, `rm`, `cp` and `mv`:
+
+| You type | What happens |
+|---|---|
+| `ls /notes/*.txt` | Only the notes ending in `.txt` |
+| `du /captures/lora/*.pcap` | The size of each capture |
+| `cp /gnss/2026-10-0?.gpx /backup` | Copies the tracks of the 1st to the 9th into `/backup`, which must exist |
+| `rm /screenshots/2026*` | Asks **once**, saying how many match, then deletes them |
+| `rm -f /screenshots/*` | Deletes them all without asking |
+
+The pattern goes in the **last part** of the path (`/notes/*.txt`, not `/*/a.txt`), and capitals don't matter. A folder that matches is left alone by `rm` unless you add `-r`. At most 64 names at a time: past that nothing is done, and you are asked for a narrower pattern. `cancel` stops what is left.
+
 The folders the firmware keeps its own files in can't be removed, as in the [Storage App](/guide/storage/).
 
 ## Screenshots