opentelemetry-cpp project CI (#2071)

.github/workflows/project_management_comment.yml

@@ -0,0 +1,20 @@
+
+name: Add comment
+on:
+  issues:
+    types:
+      - labeled
+jobs:
+  add-comment:
+    if: github.event.label.name == 'help wanted'
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - name: Add comment
+        uses: peter-evans/create-or-update-comment@a35cf36e5301d70b76f316e867e7788a55a31dae
+        with:
+          issue-number: ${{ github.event.issue.number }}
+          body: |
+            This issue is available for anyone to work on. **Make sure to reference this issue in your pull request.**
+            :sparkles: Thank you for your contribution! :sparkles:

.github/workflows/project_management_issue_open.yml

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+name: OpenTelemetry-cpp project
+on:
+  issues:
+    types:
+      - reopened
+      - opened
+  pull_request:
+    types:
+      - reopened
+      - opened
+jobs:
+  label_issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - uses: actions/github-script@v6
+        with:
+          script: |
+            github.rest.issues.addLabels({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              labels: ["needs-triage"]
+            })