feat(registry): Add hot-reload websocket, embedded UI bundling, and multi-platform Deno build tasks

Introduce a ReloadSocketManager and client ReloadService for automatic page reloads when the server restarts. Serve UI assets from an embedded generated file and add Deno tasks to bundle the UI and compile native binaries for multiple platforms. Also update dev watch workflow and ignore generated embedded UI file.

deno.lock

@@ -2,6 +2,7 @@
   "version": "5",
   "specifiers": {
     "jsr:@std/cli@^1.0.24": "1.0.24",
+    "jsr:@std/encoding@1": "1.0.10",
     "jsr:@std/encoding@^1.0.10": "1.0.10",
     "jsr:@std/fmt@^1.0.8": "1.0.8",
     "jsr:@std/fs@1": "1.0.20",
@@ -56,7 +57,7 @@
       "integrity": "53f0bb70e23a2eec3e17c4240a85bb23d185b2e20635adb37ce0f03cc4ca012a",
       "dependencies": [
         "jsr:@std/cli",
-        "jsr:@std/encoding",
+        "jsr:@std/encoding@^1.0.10",
         "jsr:@std/fmt",
         "jsr:@std/fs@^1.0.20",
         "jsr:@std/html",