added start-tmate step (#28)

Author: hellt

.github/workflows/cicd.yml

@@ -11,6 +11,11 @@ name: CICD
         description: "SR Linux version"
         required: true
         default: "23.3.2"
+      start-tmate:
+        description: "start tmate before running tests"
+        type: boolean
+        required: false
+        default: false
   pull_request:
   push:
     tags:
@@ -59,6 +64,10 @@ jobs:
       #     username: ${{ github.actor }}
       #     password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: start tmate session
+        uses: mxschmitt/action-tmate@v3
+        if: ${{ inputs.start-tmate }}
+
       - name: Test
         run: ./run.sh ci-test