Add GitHub Action to set file name for ak3zip

This action sets the file name for ak3zip based on branch, kernel version, and Android version inputs.

.github/actions/file-name/action.yml

@@ -0,0 +1,28 @@
+name: set file name for ak3zip
+description: set file name for ak3 zip
+inputs:
+ branch:
+  description: 'Device kernel'
+  required: true
+ android_version:
+  description: 'Android version (android14)'
+  required: true
+ kernel_version:
+  description: 'Kernel version (6.1)'
+  required: true
+
+runs:
+ using: composite
+ steps:
+  - name: set file name for ak3zip
+    shell: bash
+    run: |
+     ARTIFACT_BASE="${{ inputs.branch }}-${{ inputs.kernel_version }}-${{ inputs.android_version }}"
+          
+     # This gives: KSUxxxxx-branch-xxx-xxx
+     FILE_NAME="KSUN${KSU_VERSION}-${ARTIFACT_BASE}"
+      
+     echo "ARTIFACT_BASE=$ARTIFACT_BASE" >> $GITHUB_ENV
+     echo "FILE_NAME=$FILE_NAME" >> $GITHUB_ENV
+          
+     echo "✅ Final artifact name: $FILE_NAME"