feat: remove unused files and refactor tests

- Deleted `src/workers/index.ts` and `style.css` as they are no longer needed.
- Updated import paths in `quadTree.test.ts` to reflect new structure.
- Enhanced `Factory.test.ts` with additional tests for geometry handling and improved structure.
- Added comprehensive documentation for TopoJSON format and its usage.
- Introduced `Column` class in `src/statistics/Column.ts` for data handling and statistics calculations.
- Exported `Column` class from `src/statistics/index.ts` for easier access.

Author: pzq123456

data/Blue.svg

@@ -7,20 +7,11 @@
       </el-icon>
     </el-tooltip>
 
-
       <el-icon @click="toggleDrawer" class="control-icon">
         <Upload v-if="!isDrawerVisible" />
         <Download v-else />
       </el-icon>
 
-    
-    <!-- <el-tooltip :content="isCollapsed ? 'Expand' : 'Collapse'" placement="top">
-      <el-icon @click="toggleCollapse" class="control-icon">
-        <Fold v-if="!isCollapsed" />
-        <Expand v-else />
-      </el-icon>
-    </el-tooltip> -->
-
   </div>
 </template>