ci: auto-sync GitHub wiki module pages from man pages

Add tooling that makes the scdoc man pages the single source of truth and
regenerates the wiki module pages from them:

- .github/wiki/mapping.json: man-page -> wiki-page mapping (aggregation-aware)
- .github/wiki/generate.py: scdoc -> pandoc -> gfm, strips man-only sections,
  concatenates aggregated pages, appends optional extras/<Page>.md
- .github/wiki/extras/: hand-kept appendices (screenshots) with no man equivalent
- .github/workflows/wiki.yml: on push to man/** (or the tooling), regenerate
  and push the wiki; other wiki pages are left untouched

Covers all 65 man pages -> 45 wiki pages (5 new: GPS, Inhibitor, Mango, Menu,
WWAN). Non-module and hand-written wiki pages are never modified.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.github/wiki/mapping.json

@@ -0,0 +1,49 @@
+{
+  "_comment": "Maps each wiki page to the ordered list of man-page basenames that compose it. Edit this when adding a module or man page. The generator (generate.py) turns each man/<basename>.5.scd into the wiki page named by the key. Keys use the exact wiki page title (spaces become dashes in the file name, ':' is kept).",
+
+  "Module:-Backlight": ["waybar-backlight"],
+  "Module:-Backlight-Slider": ["waybar-backlight-slider"],
+  "Module:-Battery": ["waybar-battery"],
+  "Module:-Bluetooth": ["waybar-bluetooth"],
+  "Module:-Cava": ["waybar-cava"],
+  "Module:-CFFI": ["waybar-cffi"],
+  "Module:-Clock": ["waybar-clock"],
+  "Module:-CPU": ["waybar-cpu", "waybar-cpu-graph"],
+  "Module:-Custom": ["waybar-custom", "waybar-custom-graph"],
+  "Module:-Disk": ["waybar-disk"],
+  "Module:-Dwl": ["waybar-dwl-tags", "waybar-dwl-window"],
+  "Module:-Gamemode": ["waybar-gamemode"],
+  "Module:-GPS": ["waybar-gps"],
+  "Module:-Hyprland": ["waybar-hyprland-window", "waybar-hyprland-workspaces", "waybar-hyprland-submap", "waybar-hyprland-windowcount"],
+  "Module:-Idle-Inhibitor": ["waybar-idle-inhibitor"],
+  "Module:-Image": ["waybar-image"],
+  "Module:-Inhibitor": ["waybar-inhibitor"],
+  "Module:-JACK": ["waybar-jack"],
+  "Module:-Keyboard-State": ["waybar-keyboard-state"],
+  "Module:-Language": ["waybar-sway-language", "waybar-hyprland-language", "waybar-niri-language", "waybar-mango-language"],
+  "Module:-Mango": ["waybar-mango-window", "waybar-mango-workspaces", "waybar-mango-keymode", "waybar-mango-layout"],
+  "Module:-Memory": ["waybar-memory"],
+  "Module:-Menu": ["waybar-menu"],
+  "Module:-MPD": ["waybar-mpd"],
+  "Module:-MPRIS": ["waybar-mpris"],
+  "Module:-Network": ["waybar-network"],
+  "Module:-Niri": ["waybar-niri-window", "waybar-niri-workspaces"],
+  "Module:-PowerProfilesDaemon": ["waybar-power-profiles-daemon"],
+  "Module:-Privacy": ["waybar-privacy"],
+  "Module:-PulseAudio": ["waybar-pulseaudio"],
+  "Module:-PulseAudio-Slider": ["waybar-pulseaudio-slider"],
+  "Module:-River": ["waybar-river-tags", "waybar-river-mode", "waybar-river-window", "waybar-river-layout"],
+  "Module:-Sndio": ["waybar-sndio"],
+  "Module:-Sway": ["waybar-sway-workspaces", "waybar-sway-window", "waybar-sway-mode", "waybar-sway-scratchpad"],
+  "Module:-Systemd-failed-units": ["waybar-systemd-failed-units"],
+  "Module:-Taskbar": ["waybar-wlr-taskbar"],
+  "Module:-Temperature": ["waybar-temperature"],
+  "Module:-Tray": ["waybar-tray"],
+  "Module:-UPower": ["waybar-upower"],
+  "Module:-User": ["waybar-user"],
+  "Module:-Wayfire": ["waybar-wayfire-window", "waybar-wayfire-workspaces"],
+  "Module:-WirePlumber": ["waybar-wireplumber"],
+  "Module:-Workspaces": ["waybar-ext-workspaces"],
+  "Module:-WWAN": ["waybar-wwan"],
+  "States": ["waybar-states"]
+}