use schema from documentation project

Author: tisoft

.github/workflows/maven.yml

@@ -31,6 +31,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0
+          submodules: recursive
       - name: Install tools from asdf config
         uses: asdf-vm/actions/install@v2
       - name: set java home

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "documentation"]
+	path = documentation
+	url = [email protected]:SAIC-iSmart-API/documentation.git