Fix java submodules (#305)

* add java classfiles

* add java packages submodule

* remove old folder

* include module

* use checkout submodules

* checkout submodules in PR

* commit submodule

* update submodule

* move java-packages

* update submodule

* bump submodule

* fix copy command

* update submodules

* fix submodule path

* update submodule

* remove old directory

.github/workflows/pages-deploy.yml

@@ -33,7 +33,7 @@ jobs:
 
 
       - name: include java json
-        run: cp -r src/java-packages build
+        run: cp -r src/java build
 
       - name: Deploy 🚀
         uses: peaceiris/actions-gh-pages@v3

.gitmodules

@@ -1,6 +1,3 @@
 [submodule "src/java/java-packages"]
 	path = src/java/java-packages
 	url = https://github.com/source-academy/java-packages
-[submodule "src/java-packages"]
-	path = src/java-packages
-	url = https://github.com/source-academy/java-packages