feat: add uxpro-cli for easy skill installation (#4)

* feat: add uxpro-cli for easy skill installation

- Add CLI tool (uxpro-cli) with commands: init, versions, update
- Support multiple AI assistants: claude, cursor, windsurf, antigravity, all
- Update README with CLI installation guide and usage examples
- Add CC BY-NC 4.0 license
- Update feature counts to accurate numbers

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

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

* refactor: rename CLI from uxpro to uipro

- Package: uxpro-cli -> uipro-cli
- Command: uxpro -> uipro

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

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

---------

Co-authored-by: Claude <noreply@anthropic.com>

cli/src/utils/detect.ts

@@ -0,0 +1,50 @@
+import { existsSync } from 'node:fs';
+import { join } from 'node:path';
+import type { AIType } from '../types/index.js';
+
+interface DetectionResult {
+  detected: AIType[];
+  suggested: AIType | null;
+}
+
+export function detectAIType(cwd: string = process.cwd()): DetectionResult {
+  const detected: AIType[] = [];
+
+  if (existsSync(join(cwd, '.claude'))) {
+    detected.push('claude');
+  }
+  if (existsSync(join(cwd, '.cursor'))) {
+    detected.push('cursor');
+  }
+  if (existsSync(join(cwd, '.windsurf'))) {
+    detected.push('windsurf');
+  }
+  if (existsSync(join(cwd, '.agent'))) {
+    detected.push('antigravity');
+  }
+
+  // Suggest based on what's detected
+  let suggested: AIType | null = null;
+  if (detected.length === 1) {
+    suggested = detected[0];
+  } else if (detected.length > 1) {
+    suggested = 'all';
+  }
+
+  return { detected, suggested };
+}
+
+export function getAITypeDescription(aiType: AIType): string {
+  switch (aiType) {
+    case 'claude':
+      return 'Claude Code (.claude/skills/)';
+    case 'cursor':
+      return 'Cursor (.cursor/commands/ + .shared/)';
+    case 'windsurf':
+      return 'Windsurf (.windsurf/workflows/ + .shared/)';
+    case 'antigravity':
+      return 'Antigravity (.agent/workflows/ + .shared/)';
+    case 'all':
+      return 'All AI assistants';
+  }
+}