feat: Crumbs by Bretzel — self-hostable notes app MVP

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

static/manifest.webmanifest

@@ -0,0 +1,27 @@
+{
+	"name": "Crumbs by Bretzel",
+	"short_name": "Crumbs",
+	"description": "A self-hostable, offline-first note-taking app by Bretzel",
+	"start_url": "/",
+	"display": "standalone",
+	"background_color": "#202124",
+	"theme_color": "#f59e0b",
+	"icons": [
+		{
+			"src": "/icons/icon-192.png",
+			"sizes": "192x192",
+			"type": "image/png"
+		},
+		{
+			"src": "/icons/icon-512.png",
+			"sizes": "512x512",
+			"type": "image/png"
+		},
+		{
+			"src": "/icons/icon-512.png",
+			"sizes": "512x512",
+			"type": "image/png",
+			"purpose": "maskable"
+		}
+	]
+}

static/robots.txt

@@ -0,0 +1,3 @@
+# allow crawling everything by default
+User-agent: *
+Disallow: