feat: enhance complex linetype rendering with DWG text style data, gap midpoint centering, and theme defaults

index.html

@@ -107,6 +107,7 @@
       <input id="file" type="file" accept=".dwg,.dxf" />
     </label>
     <button id="sample" class="primary wasm" type="button" title="acadrust-dwg WASM">Sample DWG</button>
+    <button id="sampleCivil" class="primary wasm" type="button" title="Civil Plan & Profile DWG">평면및종단면도.dwg</button>
     <button id="sampleDxf" class="primary" type="button" title="dxf-parser">Sample DXF</button>
     <div id="spaces" title="Model Space / Paper Space (Layout)"></div>
     <button id="fit" type="button">Fit (F)</button>