Add manual workflow dispatch

Author: Richy-Z

.github/workflows/build-v2.yml

@@ -4,7 +4,7 @@
 # Removed if statement inside capture build artifacts because matrix.java will always be 21.
 # Cleaned up the yml file with better formatting and clear separation for better understanding.
 name: 🔨 Build ThreatenGL
-on: [pull_request, push]
+on: [pull_request, push, workflow_dispatch]
 
 jobs:
     build:
@@ -45,4 +45,4 @@ jobs:
               uses: actions/upload-artifact@v4
               with:
                 name: Built Artifacts
-                path: gh-artifacts-upload/
+                path: gh-artifacts-upload/