feat: add npm global package for one-command install

Add a Node.js CLI wrapper that allows installing AutoForge globally via
`npm install -g autoforge-ai` and running it with a single `autoforge`
command. The CLI handles Python detection, venv management, config
loading, and uvicorn server lifecycle automatically.

New files:
- package.json: npm package config with bin entry, files whitelist,
  and prepublishOnly script that builds the UI
- bin/autoforge.js: thin entry point that imports lib/cli.js
- lib/cli.js: main CLI module (~790 lines) with cross-platform Python
  3.11+ detection, composite venv marker for smart invalidation
  (requirements hash + Python version + path), .env config management
  at ~/.autoforge/.env, server startup with PID file and port detection,
  and signal handling with process tree cleanup
- requirements-prod.txt: runtime-only deps (excludes ruff, mypy, pytest)
- .npmignore: excludes dev files, tests, __pycache__, UI source

Modified files:
- ui/package.json: rename to autoforge-ui to avoid confusion with root
- .gitignore: add *.tgz for npm pack output
- README.md: add npm install as primary quick start method, document
  CLI commands, add Ollama/Vertex AI config sections, new troubleshooting
  entries for Python/venv issues
- GettingStarted.tsx: add Installation, Quick Start, and CLI Commands
  sections to in-app documentation with command reference table
- docsData.ts: add installation and cli-commands sidebar entries

Published as autoforge-ai@0.1.0 on npm.

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

package.json

@@ -0,0 +1,53 @@
+{
+  "name": "autoforge-ai",
+  "version": "0.1.0",
+  "description": "Autonomous coding agent with web UI - build complete apps with AI",
+  "license": "AGPL-3.0",
+  "bin": {
+    "autoforge": "./bin/autoforge.js"
+  },
+  "type": "module",
+  "engines": {
+    "node": ">=20"
+  },
+  "files": [
+    "bin/",
+    "lib/",
+    "api/",
+    "server/",
+    "mcp_server/",
+    "ui/dist/",
+    "ui/package.json",
+    ".claude/commands/",
+    ".claude/templates/",
+    "examples/",
+    "start.py",
+    "agent.py",
+    "auth.py",
+    "autoforge_paths.py",
+    "autonomous_agent_demo.py",
+    "client.py",
+    "env_constants.py",
+    "parallel_orchestrator.py",
+    "progress.py",
+    "prompts.py",
+    "registry.py",
+    "rate_limit_utils.py",
+    "security.py",
+    "requirements-prod.txt",
+    "pyproject.toml",
+    ".env.example",
+    "!**/__pycache__/",
+    "!**/*.pyc"
+  ],
+  "keywords": [
+    "ai",
+    "coding-agent",
+    "claude",
+    "autonomous",
+    "code-generation"
+  ],
+  "scripts": {
+    "prepublishOnly": "npm --prefix ui install && npm --prefix ui run build"
+  }
+}