add action definition

action.yml

@@ -0,0 +1,16 @@
+name: 'Compile Sourcemod plugin'
+description: 'Compile sourcemod plugin when source changed'
+author: 'icewind1991'
+inputs:
+  source:
+    description: 'Path to sourcepawn file'
+    required: true
+  target:
+    description: 'Path to the output smx'
+    required: true
+runs:
+  using: 'docker'
+  image: 'Dockerfile'
+  args:
+    - ${{ inputs.who-to-source }}
+    - ${{ inputs.target }}