config: enable libxkbcommon + xkeyboard-config (was ignored)

Both were set to 'ignore' with comment 'build needed'.
libxkbcommon provides keyboard handling for Wayland compositor.
xkeyboard-config provides keyboard layout definitions.
Without these, Wayland clients (KWin, Qt6 apps) cannot
process keyboard input.

Changed from 'ignore' to '{}' to enable building. This is
required for keyboard input in the graphical desktop.

config/redbear-full.toml

@@ -110,8 +110,8 @@ libdrm = {}
 
 # X11 protocol headers (needed by libxau, libxkbcommon, etc.)
 x11proto = {}
-libxkbcommon = "ignore"
-xkeyboard-config = "ignore"
+libxkbcommon = {}
+xkeyboard-config = {}
 
 libwayland = {}
 wayland-protocols = {}