feat(templates): sync Claude Code setup improvements

[fpindej]

Summary

Syncs Claude Code setup improvements from netrock PR fpindej/netrock#462 to the generator template.

Changes

• CLAUDE.md: Delegation Rule, updated Agent Team intro, autonomous behavior delegation rows
• settings.json: Full permissions section (42 allow rules, 30 deny rules) with cross-platform coverage (Unix, PowerShell, cmd.exe)
• Rules files (5 new): backend-api, database, frontend-svelte, infrastructure, testing
• Skills (2 new): /verify, /address-review
• auto-format.mjs: Shell injection fix (execFileSync with args array)
• validate-bash.mjs: npm install block, git checkout -- . bypass fix
• stop-quality-gate.mjs: Branch check (main/master warning), output schema fix
• settings.local.json.example: Template for user-specific permission overrides
• .gitignore: settings.local.json entry

Notes

• Respects existing @feature markers in template CLAUDE.md
• Frontend-specific rules (frontend-svelte.md) included as full files - the generator engine will handle include/exclude based on feature selection
• auto-format.mjs keeps backend-only formatting (no prettier section) matching the template's current scope

Test plan

• Generate a project and verify CLAUDE.md has Delegation Rule section
• Verify settings.json has permissions section in generated output
• Verify rules files are present in generated .claude/rules/
• Verify hooks have the security fixes applied