feat: initial SleepGuard implementation

Wake-on-demand proxy + agent system with SvelteKit dashboard.
Monorepo: shared types, proxy (Hono + http-proxy), agent (monitors + locks), web (SvelteKit SPA).

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

packages/shared/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "@sleepguard/shared",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
+    }
+  },
+  "scripts": {
+    "build": "tsc",
+    "typecheck": "tsc --noEmit",
+    "dev": "tsc --watch"
+  },
+  "devDependencies": {
+    "@types/node": "^22.0.0",
+    "typescript": "^5.7.0"
+  }
+}