重构项目结构：整理gitignore，移动source目录到根目录，统一依赖管理

rollup.config.js

@@ -0,0 +1,99 @@
+const resolve = require('@rollup/plugin-node-resolve');
+const commonjs = require('@rollup/plugin-commonjs');
+const terser = require('@rollup/plugin-terser');
+const dts = require('rollup-plugin-dts').default;
+const { readFileSync } = require('fs');
+
+const pkg = JSON.parse(readFileSync('./package.json', 'utf8'));
+
+const banner = `/**
+ * @esengine/ecs-framework v${pkg.version}
+ * 高性能ECS框架 - 适用于Cocos Creator和Laya引擎
+ * 
+ * @author ${pkg.author}
+ * @license ${pkg.license}
+ */`;
+
+const external = [];
+
+const commonPlugins = [
+  resolve({
+    browser: true,
+    preferBuiltins: false
+  }),
+  commonjs({
+    include: /node_modules/
+  })
+];
+
+module.exports = [
+  // ES模块构建
+  {
+    input: 'bin/index.js',
+    output: {
+      file: 'dist/index.js',
+      format: 'es',
+      banner,
+      sourcemap: true,
+      exports: 'named'
+    },
+    plugins: [
+      ...commonPlugins,
+      terser({
+        format: {
+          comments: /^!/
+        }
+      })
+    ],
+    external,
+    treeshake: {
+      moduleSideEffects: false,
+      propertyReadSideEffects: false,
+      unknownGlobalSideEffects: false
+    }
+  },
+  
+  // UMD构建（可选）
+  {
+    input: 'bin/index.js',
+    output: {
+      file: 'dist/index.umd.js',
+      format: 'umd',
+      name: 'ECSFramework',
+      banner,
+      sourcemap: true,
+      exports: 'named'
+    },
+    plugins: [
+      ...commonPlugins,
+      terser({
+        format: {
+          comments: /^!/
+        }
+      })
+    ],
+    external,
+    treeshake: {
+      moduleSideEffects: false
+    }
+  },
+  
+  // 类型定义构建
+  {
+    input: 'bin/index.d.ts',
+    output: {
+      file: 'dist/index.d.ts',
+      format: 'es',
+      banner: `/**
+ * @esengine/ecs-framework v${pkg.version}
+ * TypeScript definitions
+ */`
+    },
+    plugins: [
+      dts({
+        respectExternal: true
+      })
+    ],
+    external: []
+  }
+];