Add ReflectionHelper submodule and update build workflow

Author: Foorcee

.github/workflows/maven.yml

@@ -6,12 +6,20 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v1
-    - name: Set up JDK 11
-      uses: actions/setup-java@v1
+    - uses: actions/checkout@v5
+      with:
+        submodules: recursive
+    - name: Set up JDK 21
+      uses: actions/setup-java@v5
       with:
-        java-version: 11
+        java-version: 21
+        distribution: 'temurin'
+        cache: 'maven'
     - name: Build with Maven
-      run: mvn package --file pom.xml
+      run: mvn -B package --file pom.xml
+    - name: Upload Artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: PacketListenerAPI
+        path: Plugin/target/PacketListenerAPI_v*.jar

.gitignore

@@ -0,0 +1,4 @@
+.idea
+*.iml
+target
+dependency-reduced-pom.xml

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "ReflectionHelper"]
+	path = ReflectionHelper
+	url = https://github.com/Cytooxien/ReflectionHelper.git

ReflectionHelper

@@ -11,6 +11,7 @@
     <modules>
         <module>API</module>
         <module>Plugin</module>
+        <module>ReflectionHelper</module>
     </modules>
     <name>PacketListenerAPI</name>