[Build] Add gradle cache

Author: SpaiR

.github/workflows/ci.yml

@@ -18,6 +18,7 @@ jobs:
         with:
           java-version: 8
           distribution: liberica
+          cache: gradle
 
       - name: Build
         run: ./gradlew buildAll
@@ -65,6 +66,7 @@ jobs:
         with:
           java-version: 8
           distribution: liberica
+          cache: gradle
 
       - name: Ant Version
         run: ant -version
@@ -151,6 +153,7 @@ jobs:
         with:
           java-version: 8
           distribution: liberica
+          cache: gradle
 
       - name: Download Artifacts
         uses: actions/download-artifact@v3

config/checkstyle/suppressions.xml

@@ -13,4 +13,6 @@
     <suppress checks="FileLength" files="[\\/]imgui[\\/]"/>
     <suppress checks="FinalParameters" files="ImGui.java"/>
     <suppress checks="DesignForExtension" files="[\\/]imgui[\\/]app[\\/]"/>
+
+    <suppress checks="TypeName" files="[\\/]src[\\/]test[\\/]"/>
 </suppressions>