feat: initial public release (MAESTRO v0.1.0)

Open-source release of MAESTRO, an agent orchestration platform that runs
LLM-driven tasks through sandboxed tools, with a web UI. Apache-2.0.
See README.md and docs/ (getting-started, configuration, architecture).

ui/public/manifest.webmanifest

@@ -0,0 +1,32 @@
+{
+  "name": "Agent Orchestrator",
+  "short_name": "Orchestrator",
+  "description": "AI agent orchestration dashboard",
+  "start_url": "/ui/",
+  "scope": "/ui/",
+  "display": "standalone",
+  "orientation": "any",
+  "theme_color": "#2563eb",
+  "background_color": "#f3f6fb",
+  "lang": "ja",
+  "icons": [
+    {
+      "src": "/ui/icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/ui/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/ui/icon-maskable-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    }
+  ]
+}