feat(mango): first-class MangoWM support across DMS, dankinstaller & UI tools

- Bring up Mango to parity with niri/hyprland via a native JSON-IPC w/Native MangoServic., replaces the legacy dwl/`mmsg` path and recent breaking changes
- Dankinstall: mango supported installer, config/binds templates, and packaging (Arch AUR, Fedora Terra auto-enable, Gentoo GURU)
- Window rules: Go provider + CLI + Settings GUI editor
- Keybinds + config reload on edit (mmsg dispatch reload_config)
- Misc new supported options in DMS settings

core/internal/keybinds/providers/mangowc.go

@@ -397,6 +397,14 @@ func (m *MangoWCProvider) writeBindLine(sb *strings.Builder, bind *mangowcOverri
 	mods, key := m.parseKeyString(bind.Key)
 	command, params := m.parseAction(bind.Action)
 
+	// Description goes on the line ABOVE the bind: mango doesn't strip inline `#`
+	// comments from a value, so a trailing comment would break spawn (extra argv).
+	if bind.Description != "" {
+		sb.WriteString("# ")
+		sb.WriteString(bind.Description)
+		sb.WriteString("\n")
+	}
+
 	sb.WriteString("bind=")
 	if mods == "" {
 		sb.WriteString("none")
@@ -413,11 +421,6 @@ func (m *MangoWCProvider) writeBindLine(sb *strings.Builder, bind *mangowcOverri
 		sb.WriteString(params)
 	}
 
-	if bind.Description != "" {
-		sb.WriteString(" # ")
-		sb.WriteString(bind.Description)
-	}
-
 	sb.WriteString("\n")
 }