Adds java to the setup action

Author: ncordon

.github/actions/setup-and-build/action.yaml

@@ -11,6 +11,12 @@ runs:
         echo -e "#bin/bash\njava -jar $PWD/antlr4.jar \$@" > $HOME/.local/bin/antlr4
         chmod a+x $HOME/.local/bin/antlr4
 
+    - name: Setup java
+      uses: actions/setup-java@v4
+      with:
+        distribution: 'temurin'
+        java-version: '21'
+
     - name: Setup pnpm
       uses: pnpm/action-setup@v4