ci: introduce "response bot"

It's basically a bot that closes issues or PRs if the author hasn't
responded after 30 days. This is only done on issues/PRs that has the
`more-information-needed` label and is meant to be used for issues that
has hit a dead-end and cannot progress without further information from
the author. If the author responds after an issue is closed and gives
more context the issue can simply be reopened.

.github/workflows/response.yml

@@ -0,0 +1,35 @@
+name: no_response
+on:
+  schedule:
+    - cron: '30 1 * * *' # Run every day at 01:30
+  workflow_dispatch:
+  issue_comment:
+
+jobs:
+  close:
+    if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            const script = require('./.github/scripts/close_unresponsive.js')
+            await script({github, context})
+
+  remove_label:
+    if: github.event_name == 'issue_comment'
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            const script = require('./.github/scripts/remove_response_label.js')
+            await script({github, context})