Add docker creator and format action

.github/workflows/java-format.yml

@@ -0,0 +1,38 @@
+name: Google Java Style Format
+
+on:
+  pull_request:
+    branches: [ master, develop ]
+
+jobs:
+  java-formatting:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.PAT }}
+
+      - name: Check for Java files
+        id: check_java_files
+        run: |
+          if [ -n "$(find . -name '*.java' -print -quit)" ]; then
+            echo "java_files_exist=true" >> $GITHUB_OUTPUT
+          else
+            echo "java_files_exist=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Google Java Style Format
+        if: steps.check_java_files.outputs.java_files_exist == 'true'
+        uses: axel-op/googlejavaformat-action@v3
+        with:
+          # --aosp: 4-space indentation
+          args: "--replace --aosp"
+          # Can not auto commit, we'll commit manually
+          skip-commit: true
+
+      - name: Commit Changes
+        if: steps.check_java_files.outputs.java_files_exist == 'true'
+        uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          commit_message: "Apply Google Java Style Format"

.gitignore

@@ -22,3 +22,6 @@
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
 replay_pid*
+
+# root directory for the file explorer
+.root/

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "3rdparty/docker-script"]
+	path = 3rdparty/docker-script
+	url = https://github.com/CMIPT/docker-script.git