Workflow dispatch for full check (cvat-ai#92)

* add workflow_dispatch trigger
* full.yml: add inputs for workflow dispatch trigger

Author: sizov-kirill

.github/workflows/full.yml

@@ -6,6 +6,10 @@ on:
         type: string
         required: true
   workflow_dispatch:
+    inputs:
+      ref:
+        type: string
+        required: true
 
 env:
   WORKFLOW_RUN_URL: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}