chore: add GitHub templates and CI workflow (#7)

- Add issue templates (feature, bug, infra, docs)
- Add PR template
- Add CI workflow (lint, build, test)

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Co-authored-by: Alexa Louise <YOUR_REAL_EMAIL@EXAMPLE.COM>
Co-authored-by: Claude <noreply@anthropic.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,33 @@
+---
+name: Bug Report
+about: Report something that isn't working correctly
+title: "[Bug] "
+labels: type:bug, status:backlog
+assignees: ''
+---
+
+## Summary
+<!-- One-sentence description of the bug -->
+
+## Steps to Reproduce
+1. Go to '...'
+2. Click on '...'
+3. See error
+
+## Expected Behavior
+<!-- What should happen? -->
+
+## Actual Behavior
+<!-- What actually happens? -->
+
+## Environment
+- Service/Repo:
+- Environment: (local / staging / prod)
+- Browser/Client: (if applicable)
+- OS:
+
+## Logs / Screenshots
+<!-- Paste relevant logs or attach screenshots -->
+
+## Possible Fix
+<!-- If you have ideas on how to fix this -->