chore: remove .github templates (moved to Gitea)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,40 +0,0 @@
----
-name: Bug Report
-about: Report a bug or unexpected behavior
-title: "[Bug] "
-labels: bug
-assignees: ""
----
-
-## Description
-
-A clear and concise description of the bug.
-
-## Steps to Reproduce
-
-1. Go to '...'
-2. Click on '...'
-3. See error
-
-## Expected Behavior
-
-What you expected to happen.
-
-## Actual Behavior
-
-What actually happened.
-
-## Environment
-
-- **OS:** [e.g., macOS 15, Ubuntu 24.04]
-- **Browser:** [e.g., Chrome 131, Safari 18]
-- **Node.js:** [e.g., 20.x]
-- **Package manager:** [e.g., pnpm 9.x]
-
-## Screenshots / Logs
-
-If applicable, add screenshots or error logs.
-
-## Additional Context
-
-Any other context about the problem.

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +0,0 @@
-blank_issues_enabled: true
-contact_links:
-  - name: Questions & Discussions
-    url: https://github.com/YOUR_ORG/YOUR_REPO/discussions
-    about: Use Discussions for general questions instead of opening an issue.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,23 +0,0 @@
----
-name: Feature Request
-about: Suggest a new feature or improvement
-title: "[Feature] "
-labels: enhancement
-assignees: ""
----
-
-## Problem
-
-A clear description of the problem this feature would solve.
-
-## Proposed Solution
-
-How you think this should work.
-
-## Alternatives Considered
-
-Other approaches you've thought about and why they're less suitable.
-
-## Additional Context
-
-Any mockups, references, or related issues.

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,29 +0,0 @@
-## What changed and why
-
-<!-- Brief description of the changes and motivation -->
-
-## Type of change
-
-- [ ] Bug fix
-- [ ] New feature
-- [ ] Refactoring (no functional changes)
-- [ ] Documentation update
-- [ ] Configuration / CI change
-
-## Checklist
-
-- [ ] Code follows project conventions (`RULES.md`)
-- [ ] Relevant documentation updated (`docs/`, `DOCS.md`)
-- [ ] Tests added/updated (if applicable)
-- [ ] No secrets or credentials in the diff
-- [ ] Breaking changes described below (if any)
-
-## Breaking Changes
-
-<!-- List any breaking changes, or write "None" -->
-
-None
-
-## Related Issues
-
-<!-- Link related issues: Fixes #123, Relates to #456 -->