chore!:csfl. add pull request template and dependabot configuration files

Author: tanhongit

.github/dependabot.yml

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+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"

.github/pull_request_template.md

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+## Summary
+<!-- Describe why you made changes and the changes, including screenshots if necessary. What did you do with this pull request? -->
+
+## Unit Testing
+<!-- List your unit/integration tests here, or if there are no unit tests, please explain why. -->
+
+## Operation check
+<!-- URL of checklist, etc. -->
+
+> [!CAUTION]
+> ### Release Notes
+> <!-- * Information if you need to manually configure something at release time -->
+> <!-- * Commands to run after release, etc. -->
+> * 
+
+> [!NOTE]
+> ### Additional Notes
+> <!-- * Reference information for reviewers (if there are any implementation concerns or points of note, please state them) -->
+> * 
+
+## Checklist
+* [ ] Code follows our Coding Standards.
+* [ ] Code matches the confirmed solution in the ticket.
+* [ ] Unit/Integration tests have been added or updated.
+* [ ] Env/Config/DB changes were confirmed by @cslant/admin.

.github/workflows/dependabot-auto-merge.yml

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+name: Dependabot auto-merge
+on: pull_request_target
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: ${{ github.actor == 'dependabot[bot]' }}
+    steps:
+
+      - name: Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v3.1.0
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+
+      - name: Auto-merge Dependabot PRs for semver-major updates
+        if: ${{steps.metadata.outputs.update-type == 'version-update:semver-minor'}}
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+
+      - name: Auto-merge Dependabot PRs for semver-patch updates
+        if: ${{steps.metadata.outputs.update-type == 'version-update:semver-patch'}}
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}