update unity, use text decal from git, add gitea workflow

.gitea/workflows/build.yaml

@@ -0,0 +1,65 @@
+name: build
+on:
+  - push
+  - pull_request
+
+jobs:
+        
+  checklicense:
+    name: Check for UNITY_LICENSE in GitHub Secrets
+    runs-on: ubuntu-latest
+    outputs:
+      is_unity_license_set: ${{ steps.checklicense_job.outputs.is_unity_license_set }}
+    steps:
+      - name: Check whether unity activation requests should be done
+        id: checklicense_job
+        env:
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+          UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
+          UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
+        run: |
+          echo "Skip activation job: ${{ env.UNITY_LICENSE != '' }}"
+          export is_unity_license_set="${{ env.UNITY_LICENSE != '' }}"
+          echo "is_unity_license_set=$is_unity_license_set" >> $GITHUB_OUTPUT
+          
+  build:
+    name: Build for ${{ matrix.targetPlatform }}
+    needs: checklicense
+    runs-on: 
+      - ubuntu-latest
+    container:
+      volumes:
+        - /volume1/docker/gitea_actions/act:/volume1/docker/gitea_actions/act
+        - /volume1/docker/gitea_actions/workspace:/volume1/docker/gitea_actions/workspace
+    strategy:
+      fail-fast: false
+      matrix:
+        targetPlatform:
+#          - Android
+          - WebGL
+    steps:
+      - uses: actions/checkout@v4.2.2
+        with:
+          lfs: true
+      - uses: actions/cache@v4.2.2
+        with:
+          path: Library
+          key: Library-${{ matrix.targetPlatform }}
+      - uses: https://git.chikalin.space/unity/unity-builder@742a850b88e70342487c06e2f5b57675184b9503
+        options: --volumes-from=${{ env.JOB_CONTAINER_NAME }}
+        env:
+          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+          UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
+          UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
+#          JOB_CONTAINER_NAME: ${{ env.JOB_CONTAINER_NAME }}
+          ACTION_FOLDER: /volume1/docker/gitea_actions/act/89fa79d6bd3aaa9f7d3b54bdd5ab294be883964442f1a7519922be8d66f94342/dist
+        with:
+          targetPlatform: ${{ matrix.targetPlatform }}
+          dockerCpuLimit: 0
+          RUNNER_TEMP: /volume1/docker/gitea_actions/act/temp
+          buildProfile: Assets/Settings/Build Profiles/Android Release.asset
+          dockerWorkspacePath: /volume1/docker/gitea_actions/workspace/unity/textdecalURP
+      - uses: actions/upload-artifact@v3
+        with:
+          name: Build-${{ matrix.targetPlatform }}
+          path: build