Controls map: docs/CONTROLS.md, shipped with the dist

Written from the default bindings.txt so it matches what the game
actually writes. Covers the Xbox pad (ASCII diagram plus a table of
every button and its RIO address), the keyboard - numpad flight
cluster diagram, the Shift/Ctrl/Alt throttle and reverse modifiers,
Alt+Q abort - and the panel button banks, showing how the number and
letter rows map onto the five MFD clusters exactly as printed on the
pod board, with the G/B gap keys and the F-key Secondary/Screen
columns. Also notes the keypads being deliberately unbound, the RGB
lamp mirror, and how to rebind with worked examples.

pack-dist copies it to the dist as CONTROLS.txt, flattened to ASCII so
it reads correctly in Notepad while the markdown source keeps its
typography. README links it.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

pack-dist.ps1

@@ -64,6 +64,18 @@ foreach ($file in 'RPDPL.INI', 'JOYSTICK.INI', 'RPL4.RES', 'TEST.EGG',
     Copy-Item (Join-Path $assets $file) $dist
 }
 
+# The controls map travels with the game (players get the diagrams
+# without needing the repo). Flattened to ASCII so it reads correctly
+# in Notepad - the markdown source keeps its typography.
+$controls = Get-Content (Join-Path $root 'docs\CONTROLS.md') -Raw -Encoding UTF8
+foreach ($pair in @(
+        @([char]0x2014, '-'), @([char]0x2013, '-'), @([char]0x2018, "'"),
+        @([char]0x2019, "'"), @([char]0x201C, '"'), @([char]0x201D, '"'),
+        @([char]0x00D7, 'x'), @([char]0x2192, '->'), @([char]0x2026, '...'))) {
+    $controls = $controls.Replace([string]$pair[0], [string]$pair[1])
+}
+Set-Content -Path "$dist\CONTROLS.txt" -Encoding ascii -Value $controls
+
 # --- OpenAL runtime --------------------------------------------------------
 # The exe links OpenAL32.dll (32-bit). Prefer shipping the already-installed
 # runtime beside the exe; oalinst.exe covers machines where that misses.
@@ -259,7 +271,8 @@ pod's real button banks: click them with the mouse, and they light up
 as the game commands their lamps.
 environ.ini is self-documenting: every option ships in the file with
 a comment (Steam networking, keyboard lighting, stick inversion, LAN
-hosting, developer keys, and more).
+hosting, developer keys, and more). CONTROLS.txt has the full controls
+map with pad and keyboard diagrams.
 
 Known prototype notes: pods race untextured (the player1-8 skins come
 from the presets system, not shipped data), and text drawn on the plasma