fix：fix unrecognized .node and move unused files to abandoned

src/index.html

@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>Webpack HMR</title>
-</head>
-<body>
-<div id="root"></div>
-</body>
-</html>

src/style.css

@@ -1,6 +0,0 @@
-body {
-    font-family: Arial, sans-serif;
-    background-color: lightblue;
-    text-align: center;
-    padding: 20px;
-}