version bump, readme update, pacakge maintainence

.gitignore

···
 yarn-error.log*
 pnpm-debug.log*
 lerna-debug.log*
-
+demo
 node_modules
 dist
 lib-dist
···
 *.sln
 *.sw?
 
-*.tsbuildinfo
+*.tsbuildinfo

README.md

···
 
 ```tsx
 import { AtProtoProvider, BlueskyPost, LeafletDocument } from "atproto-ui";
+import "atproto-ui/styles.css";
 
 export function App() {
 	return (

lib/index.ts

···
 // Master exporter for the AT React component library.
 
-// Global styles - import this in your app root
 import "./styles.css";
 
 // Providers & core primitives
···
 // Types
 export * from "./types/bluesky";
 export * from "./types/leaflet";
+export * from "./types/theme";
 
 // Utilities
 export * from "./utils/at-uri";

package.json

···
 	"scripts": {
 		"dev": "vite",
 		"build": "vite build && tsc -b",
+		"build:demo": "BUILD_TARGET=demo vite build",
+		"build:all": "npm run build && npm run build:demo",
 		"lint": "eslint .",
 		"preview": "vite preview",
 		"prepublishOnly": "npm run build"

src/App.tsx

···
 import React, { useState, useCallback, useRef } from "react";
 import { AtProtoProvider } from "../lib";
+import "../lib/styles.css"
 import "./App.css";
 
 import { TangledString } from "../lib/components/TangledString";

vite.config.ts

···
     };
 }
 
+const buildDemo = process.env.BUILD_TARGET === 'demo';
+
 // https://vite.dev/config/
 export default defineConfig({
-    plugins: [react(), dts({ tsconfigPath: './tsconfig.lib.json' }), injectCssImport()],
-    build: {
+    plugins: buildDemo
+        ? [react()]
+        : [react(), dts({ tsconfigPath: './tsconfig.lib.json' }), injectCssImport()],
+
+    // Demo app needs to resolve from src
+    root: buildDemo ? '.' : undefined,
+
+    build: buildDemo ? {
+        // Demo app build configuration
+        outDir: 'demo',
+        rollupOptions: {
+            input: resolve(__dirname, 'index.html')
+        },
+        sourcemap: true
+    } : {
+        // Library build configuration
         lib: {
             entry: resolve(__dirname, 'lib/index.ts'),
             name: 'atproto-ui',