feat: add in-app update checker, enhance About page and project metadata

- Add AtlasUpdateChecker with GitHub Releases API integration
- Add AtlasVersionComparator for semantic version comparison
- Add AboutUpdateToolbarButton with popover update UI
- Enhance AboutFeatureView with social QR codes and layout refinements
- Add CHANGELOG.md and CODE_OF_CONDUCT.md
- Rebrand project files from Mole to Atlas for Mac
- Update build script to support version/build number injection
- Add installation guide to README
- Add bilingual localization strings for update feature
- Add unit tests for update checker and version comparator

.github/ISSUE_TEMPLATE/config.yml

@@ -1,11 +1,8 @@
 blank_issues_enabled: false
 contact_links:
   - name: Private Security Report
-    url: mailto:hitw93@gmail.com?subject=Mole%20security%20report
+    url: mailto:cszhk0310@gmail.com?subject=Atlas%20for%20Mac%20security%20report
     about: Report a suspected vulnerability privately instead of opening a public issue
-  - name: Telegram Community
-    url: https://t.me/+GclQS9ZnxyI2ODQ1
-    about: Join our Telegram group for questions and discussions
   - name: GitHub Discussions
-    url: https://github.com/tw93/mole/discussions
+    url: https://github.com/CSZHK/CleanMyPc/discussions
     about: Ask questions and share ideas with the community