Chore: Add issue/PR template, CoC and Contributing guide (#774)

- Added issue and PR templates
- Improved issue chooser
- Added Code of Conduct and Contributing guide
  - Includes contributor agreement to Apache 2.0

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,4 +1,4 @@
-name: Bug Report
+name: 🐛 Bug Report
 description: File a bug report
 labels: ["bug"]
 body:

.github/ISSUE_TEMPLATE/config.yml

@@ -1,11 +1,11 @@
 blank_issues_enabled: false
 contact_links:
-    - name: Feature Request
+    - name: ✨ Feature Request
       url: https://github.com/cline/cline/discussions/categories/feature-requests?discussions_q=is%3Aopen+category%3A%22Feature+Requests%22+sort%3Atop
       about: Share and vote on feature requests for Cline
-    - name: Cline Discord
+    - name: 👋 Cline Discord
       url: https://discord.gg/cline
       about: Join our Discord community for discussions and support
-    - name: Other Questions?
+    - name: ❓ Other Questions?
       url: https://x.com/sdrzn
       about: Contact the developer on X @sdrzn for other inquiries

.github/pull_request_template.md

@@ -0,0 +1,23 @@
+### Description
+<!-- Describe your changes in detail. What problem does this PR solve? -->
+
+### Type of Change
+<!-- Put an 'x' in all boxes that apply -->
+
+- [ ] 🐛 Bug fix (non-breaking change which fixes an issue)
+- [ ] ✨ New feature (non-breaking change which adds functionality)
+- [ ] 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] 📚 Documentation update
+
+### Pre-flight Checklist
+<!-- Put an 'x' in all boxes that apply -->
+
+- [ ] Changes are limited to a single feature, bugfix or chore (split larger changes into seperate PRs)
+- [ ] Tests are passing (`npm test`) and code is formatted and linted (`npm run format && npm run lint`)
+- [ ] I have reviewed [contributor guidelines](https://github.com/cline/cline/blob/main/CONTRIBUTOR.md)
+
+### Screenshots
+<!-- For UI changes, add screenshots here -->
+
+### Additional Notes
+<!-- Add any additional notes for reviewers -->