debug: add ninja verbose output to see compile commands

Temporarily adding -v flag to ninja builds to see actual compile
commands. This will show whether ccache is actually being invoked
or if the CMAKE_C_COMPILER_LAUNCHER setting isn't taking effect.

We should see either:
  ccache /usr/bin/g++-13 -c file.cpp  (working)
  /usr/bin/g++-13 -c file.cpp         (not working)

This is temporary for debugging - remove once ccache issue resolved.

.github/actions/xahau-ga-build/action.yml

@@ -161,7 +161,8 @@ runs:
       shell: bash
       run: |
         cd ${{ inputs.build_dir }}
-        cmake --build . --config ${{ inputs.configuration }} --parallel $(nproc)
+        # TEMPORARY: Add -v to see compile commands for ccache debugging
+        cmake --build . --config ${{ inputs.configuration }} --parallel $(nproc) -- -v
 
     - name: Show ccache statistics
       if: inputs.ccache_enabled == 'true'