docs: README for the blueprint structure; drop standalone-UI sections

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ui/package.json

@@ -1,34 +0,0 @@
-{
-	"name": "punktfunk-plugin-rom-manager-ui",
-	"private": true,
-	"type": "module",
-	"description": "The ROM Manager plugin SPA — built into ../dist/ui and served by servePluginUi. Uses @unom/ui so it reads as family with the punktfunk console.",
-	"scripts": {
-		"dev": "vite",
-		"build": "vite build",
-		"typecheck": "tsc --noEmit"
-	},
-	"dependencies": {
-		"@fontsource-variable/geist": "^5.2.9",
-		"@unom/style": "^0.4.4",
-		"@unom/ui": "^0.8.16",
-		"class-variance-authority": "^0.7.1",
-		"clsx": "^2.1.1",
-		"lucide-react": "^0.469.0",
-		"motion": "^12.42.2",
-		"radix-ui": "^1.6.2",
-		"react": "^19.2.0",
-		"react-dom": "^19.2.0",
-		"tailwind-merge": "^2.6.1"
-	},
-	"devDependencies": {
-		"@tailwindcss/vite": "^4.3.2",
-		"@types/react": "^19.2.0",
-		"@types/react-dom": "^19.2.0",
-		"@vitejs/plugin-react": "^5.0.0",
-		"tailwindcss": "^4.3.2",
-		"tw-animate-css": "^1.4.0",
-		"typescript": "^5.9.3",
-		"vite": "^7.0.0"
-	}
-}