Feature/tilemap editor (#237)

* feat: 添加 Tilemap 编辑器插件和组件生命周期支持

* feat(editor-core): 添加声明式插件注册 API

* feat(editor-core): 改进tiledmap结构合并tileset进tiledmapeditor

* feat: 添加 editor-runtime SDK 和插件系统改进

* fix(ci): 修复SceneResourceManager里变量未使用问题

packages/asset-system/src/utils/UVHelper.ts

@@ -0,0 +1,81 @@
+/**
+ * UV Coordinate Helper
+ * UV 坐标辅助工具
+ *
+ * 引擎使用图像坐标系：
+ * Engine uses image coordinate system:
+ * - 原点 (0, 0) 在左上角 | Origin at top-left
+ * - V 轴向下增长 | V-axis increases downward
+ * - UV 格式：[u0, v0, u1, v1] 其中 v0 < v1
+ */
+export class UVHelper {
+    /**
+     * Calculate UV coordinates for a texture region
+     * 计算纹理区域的 UV 坐标
+     */
+    static calculateUV(
+        imageRect: { x: number; y: number; width: number; height: number },
+        textureSize: { width: number; height: number }
+    ): [number, number, number, number] {
+        const { x, y, width, height } = imageRect;
+        const { width: tw, height: th } = textureSize;
+
+        return [
+            x / tw,              // u0
+            y / th,              // v0
+            (x + width) / tw,    // u1
+            (y + height) / th    // v1
+        ];
+    }
+
+    /**
+     * Calculate UV coordinates for a tile in a tileset
+     * 计算 tileset 中某个 tile 的 UV 坐标
+     */
+    static calculateTileUV(
+        tileIndex: number,
+        tilesetInfo: {
+            columns: number;
+            tileWidth: number;
+            tileHeight: number;
+            imageWidth: number;
+            imageHeight: number;
+            margin?: number;
+            spacing?: number;
+        }
+    ): [number, number, number, number] | null {
+        if (tileIndex < 0) return null;
+
+        const {
+            columns,
+            tileWidth,
+            tileHeight,
+            imageWidth,
+            imageHeight,
+            margin = 0,
+            spacing = 0
+        } = tilesetInfo;
+
+        const col = tileIndex % columns;
+        const row = Math.floor(tileIndex / columns);
+        const x = margin + col * (tileWidth + spacing);
+        const y = margin + row * (tileHeight + spacing);
+
+        return this.calculateUV(
+            { x, y, width: tileWidth, height: tileHeight },
+            { width: imageWidth, height: imageHeight }
+        );
+    }
+
+    static validateUV(uv: [number, number, number, number]): boolean {
+        const [u0, v0, u1, v1] = uv;
+        return u0 >= 0 && u0 <= 1 && u1 >= 0 && u1 <= 1 &&
+               v0 >= 0 && v0 <= 1 && v1 >= 0 && v1 <= 1 &&
+               u0 < u1 && v0 < v1;
+    }
+
+    static debugPrint(uv: [number, number, number, number], label?: string): void {
+        const prefix = label ? `[${label}] ` : '';
+        console.log(`${prefix}UV: [${uv.map(n => n.toFixed(4)).join(', ')}]`);
+    }
+}