chore: add new workflows

.github/auto-response.yml

@@ -0,0 +1,37 @@
+name: Automated Responses
+
+on:
+  issues:
+    types: [opened]
+  pull_request:
+    types: [opened]
+
+jobs:
+  respond:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Comment on new issue
+      if: github.event_name == 'issues'
+      uses: actions/github-script@v6
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        script: |
+          github.rest.issues.createComment({
+            issue_number: context.issue.number,
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: 'Thanks for opening this issue! A maintainer will review it soon.',
+          })
+    - name: Comment on new pull request
+      if: github.event_name == 'pull_request'
+      uses: actions/github-script@v6
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        script: |
+          github.rest.pulls.createReview({
+            pull_number: context.pull_request.number,
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            body: 'Thanks for opening this pull request! A maintainer will review it soon.',
+            event: 'COMMENT',
+          })

.github/labeler.yml

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+name: Auto Labeling
+
+on:
+  issues:
+    types: [opened, labeled, unlabeled]
+  pull_request:
+    types: [opened, labeled, unlabeled]
+
+jobs:
+  label:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Label issues and pull requests
+        uses: actions/labeler@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}

.github/stale.yml

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+name: Stale Issues and PRs
+
+on:
+  schedule:
+    - cron: '0 0 * * *' # Runs every day at midnight
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Close stale issues and pull requests
+        uses: actions/stale@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          days-before-stale: 15
+          days-before-close: 7
+          stale-issue-message: 'This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs within the next 7 days.'
+          stale-pr-message: 'This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs within the next 7 days.'