GitHub Workflow: Use new setup-godot-cpp github action from godot-cpp submodule.

Author: Ivorforce

.github/actions/build/action.yml

@@ -276,13 +276,24 @@ jobs:
       #    clang-format src/** --dry-run --Werror
 
 # Build
-      - name: 🔗 GDExtension Debug Build
-        uses: ./.github/actions/build
+      - name: Setup godot-cpp
+        uses: ./godot-cpp/.github/actions/setup-godot-cpp
         with:
           platform: ${{ matrix.platform }}
-          arch: ${{ matrix.arch }}
-          float-precision: ${{ matrix.float-precision }}
-          build-target-type: ${{ matrix.target-type }}
+          em-version: 3.1.62
+
+# Build GDExtension
+      - name: Cache .scons_cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ github.workspace }}/.scons-cache/
+          key: ${{ matrix.platform }}_${{ matrix.arch }}_${{ matrix.float-precision }}_${{ matrix.target-type }}_cache
+      - name: Build GDExtension Debug Build
+        shell: sh
+        env:
+          SCONS_CACHE: ${{ github.workspace }}/.scons-cache/
+        run: |
+          scons target=${{ matrix.target-type }} platform=${{ matrix.platform }} arch=${{ matrix.arch }} precision=${{ matrix.float-precision }}
 
 # Sign
       - name: Mac Sign