chore: Improve .gitignore - remove tracked runtime files

Enhanced .gitignore to properly exclude all runtime and temporary files
from version control.

## Changes Made

### Files Removed from Tracking
- .claude-flow/metrics/*.json (runtime metrics)
- .swarm/memory.db (swarm state database)

These files were previously tracked but should never be versioned as they
contain runtime state that changes frequently.

### .gitignore Improvements

**Removed Duplicate:**
- .swarm/ was listed twice (lines 6 and 64)

**Added Patterns:**
- npm-debug.log*, yarn-debug.log*, yarn-error.log* (npm/yarn logs)
- test-results/ (Playwright test outputs)
- playwright-report/ (Playwright HTML reports)
- playwright/.cache/ (Playwright browser cache)
- *.spec.js.snap (Jest snapshots for E2E tests)
- .npm/ (npm cache directory)
- .eslintcache (ESLint cache file)
- *.tsbuildinfo (TypeScript build info)

**Reorganized Sections:**
- Clearer section headers
- Removed redundant .swarm/ entry
- Better categorization of patterns

## Benefits

✅ No more runtime files cluttering git status
✅ Cleaner git history (no metric/state changes)
✅ Better Playwright test support
✅ Comprehensive npm/yarn log exclusion
✅ Organized and maintainable .gitignore

## Verification

After this commit:
- git status should be clean
- Runtime files (.db, metrics) no longer tracked
- All test artifacts properly excluded

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.gitignore

@@ -1,5 +1,5 @@
 
-# Claude Flow generated files
+# Claude Flow & Swarm Coordination
 .claude/settings.local.json
 .mcp.json
 claude-flow.config.json
@@ -23,10 +23,9 @@ coordination/orchestration/*
 *.sqlite-journal
 *.sqlite-wal
 claude-flow
-# Removed Windows wrapper files per user request
 hive-mind-prompt-*.txt
 
-# Chess game specific ignores
+# Project specific
 # Dependencies
 node_modules/
 package-lock.json
@@ -34,11 +33,18 @@ package-lock.json
 # Testing
 coverage/
 .nyc_output/
+test-results/
+playwright-report/
+playwright/.cache/
+*.spec.js.snap
 
 # Build outputs
 dist/
 build/
 *.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
 
 # IDE
 .vscode/
@@ -61,6 +67,10 @@ Thumbs.db
 *.temp
 
 # CI/CD artifacts
-.swarm/
 quality-report.md
 release/
+
+# Runtime & Cache
+.npm/
+.eslintcache
+*.tsbuildinfo