Add acknowledgment comment when ilverify command starts

Co-authored-by: T-Gro <46543583+T-Gro@users.noreply.github.com>

Author: Copilot

.github/workflows/commands.yml

@@ -80,6 +80,19 @@ jobs:
       if: steps.command-extractor.outputs.result == 'xlf'
       id: xlf
       run: dotnet build src/Compiler /t:UpdateXlf
+    - name: Post ilverify start comment
+      if: steps.command-extractor.outputs.result == 'ilverify'
+      uses: actions/github-script@v3
+      with:
+        script: |
+          const body = `Started to run ilverify baseline update`;
+          await github.issues.createComment({
+            issue_number: context.issue.number,
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: body
+          });
+
     - name: Process ilverify command (Update ILVerify baselines)
       if: steps.command-extractor.outputs.result == 'ilverify'
       id: ilverify