add: absorb uno-online as regular subdirectory

UNO card game web app (Node.js/React) with Miku bot integration.
Previously an independent git repo (fork of mizanxali/uno-online).
Removed .git/ and absorbed into main repo for unified tracking.

Includes bot integration code: botActionExecutor, cardParser,
gameStateBuilder, and server-side bot action support.
37 files, node_modules excluded via local .gitignore.

uno-online/client/src/components/Homepage.js

@@ -0,0 +1,27 @@
+import React, { useState } from 'react'
+import { Link } from 'react-router-dom'
+import randomCodeGenerator from '../utils/randomCodeGenerator'
+
+const Homepage = () => {
+    const [roomCode, setRoomCode] = useState('')
+
+    return (
+        <div className='Homepage'>
+            <div className='homepage-menu'>
+                <img src={require('../assets/logo.png').default} width='200px' />
+                <div className='homepage-form'>
+                    <div className='homepage-join'>
+                        <input type='text' placeholder='Game Code' onChange={(event) => setRoomCode(event.target.value)} />
+                        <Link to={`/play?roomCode=${roomCode}`}><button className="game-button green">JOIN GAME</button></Link>
+                    </div>
+                    <h1>OR</h1>
+                    <div className='homepage-create'>
+                        <Link to={`/play?roomCode=${randomCodeGenerator(5)}`}><button className="game-button orange">CREATE GAME</button></Link>
+                    </div>
+                </div>
+            </div>
+        </div>
+    )
+}
+
+export default Homepage

uno-online/client/src/components/Spinner.js

@@ -0,0 +1,9 @@
+import React from 'react'
+
+const Spinner = () => {
+    return (
+        <div className="loader">Loading...</div>
+    )
+}
+
+export default Spinner