Added subtask.md and stale-bot.yml files

Author: Prasanjeet-Microsoft

.github/ISSUE_TEMPLATE/subtask.md

@@ -0,0 +1,22 @@
+---
+name: Sub task
+about: A sub task
+title: ''
+labels: subtask
+assignees: ''
+
+---
+
+Required by <link to parent issue>
+
+# Description
+
+A clear and concise description of what this subtask is.
+
+# Tasks
+
+_To be filled in by the engineer picking up the subtask
+
+- [ ] Task 1
+- [ ] Task 2
+- [ ] ...

.github/pr-title-checker.yml

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+name: "pr-title-checker"
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - edited
+      - synchronize
+  merge_group:
+
+permissions:
+  pull-requests: read
+
+jobs:
+  main:
+    name: Validate PR title
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name != 'merge_group' }}
+    steps:
+      - uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/stale-bot.yml

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+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+permissions:
+  contents: write
+  issues: write
+  pull-requests: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v9
+        with:
+          stale-issue-message: 'This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 30 days.'
+          days-before-stale: 180
+          days-before-close: 30