✨ feat(clock): add complete Clock app with backend, web, and landing

Features:
- World clock with timezone support and drag & drop sorting
- Alarms with repeat days, snooze, and custom sounds
- Multiple timers with start/pause/reset controls
- Stopwatch with lap times (local only)
- Pomodoro timer with customizable intervals
- Analog and digital clock widgets
- i18n support (DE, EN, FR, ES, IT)

Stack:
- Backend: NestJS 10, Drizzle ORM, PostgreSQL (port 3017)
- Web: SvelteKit 2.x, Svelte 5 runes, Tailwind CSS 4 (port 5186)
- Landing: Astro 5.x with animated clock hero (port 4323)

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

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

apps/clock/packages/shared/package.json

@@ -0,0 +1,19 @@
+{
+	"name": "@clock/shared",
+	"version": "1.0.0",
+	"private": true,
+	"type": "module",
+	"main": "./src/index.ts",
+	"exports": {
+		".": "./src/index.ts",
+		"./types": "./src/types/index.ts",
+		"./constants": "./src/constants/index.ts"
+	},
+	"scripts": {
+		"type-check": "tsc --noEmit",
+		"lint": "eslint src"
+	},
+	"devDependencies": {
+		"typescript": "^5.7.2"
+	}
+}