feat: add Learning Paths, examples, and project governance files

### New Content
- Learning Paths section in README (Junior/Senior/Power User/PM tracks)
- examples/ folder with 18 ready-to-use templates:
  - 4 agents (code-reviewer, test-writer, security-auditor, refactoring)
  - 2 skills (TDD workflow, security checklist)
  - 3 commands (commit, review-pr, generate-tests)
  - 4 hooks (bash + PowerShell for security, formatting)
  - 3 config templates (settings, MCP, gitignore)
  - 2 memory templates (project + personal CLAUDE.md)

### Governance
- CHANGELOG.md: Version history (1.0.0 → 1.1.0 → Unreleased)
- CONTRIBUTING.md: Contribution guidelines for community

### Documentation
- llms.txt: Updated structure with new files/folders

This update makes the guide more actionable with concrete templates
and provides clear learning paths for different skill levels.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

examples/config/.gitignore-claude

@@ -0,0 +1,18 @@
+# Claude Code - Git Ignore Patterns
+# Add these to your project's .gitignore
+
+# Local settings (personal preferences)
+.claude/settings.local.json
+
+# Local memory (personal notes, not for team)
+.claude/CLAUDE.md
+
+# MCP server data (if using Serena memory)
+.serena/
+
+# Temporary Claude files
+.claude/tmp/
+.claude/cache/
+
+# Debug logs
+claude-debug.log

examples/config/mcp.json

@@ -0,0 +1,33 @@
+{
+  "mcpServers": {
+    "serena": {
+      "command": "uvx",
+      "args": ["serena", "--project-root", "."],
+      "description": "Codebase indexation and session memory"
+    },
+    "context7": {
+      "command": "npx",
+      "args": ["-y", "@upstash/context7-mcp"],
+      "description": "Library documentation lookup"
+    },
+    "sequential": {
+      "command": "npx",
+      "args": ["-y", "@anthropic/sequential-thinking-mcp"],
+      "description": "Structured multi-step reasoning"
+    },
+    "playwright": {
+      "command": "npx",
+      "args": ["-y", "@anthropic/playwright-mcp"],
+      "description": "Browser automation and testing"
+    },
+    "postgres": {
+      "command": "npx",
+      "args": [
+        "-y",
+        "@modelcontextprotocol/server-postgres",
+        "postgresql://user:password@localhost:5432/database"
+      ],
+      "description": "PostgreSQL database queries"
+    }
+  }
+}

examples/config/settings.json

@@ -0,0 +1,16 @@
+{
+  "hooks": {
+    "PreToolUse": [
+      {
+        "matcher": "Bash",
+        "command": ".claude/hooks/security-check.sh"
+      }
+    ],
+    "PostToolUse": [
+      {
+        "matcher": "Write|Edit",
+        "command": ".claude/hooks/auto-format.sh"
+      }
+    ]
+  }
+}