feat(前端界面): OFDGo WebUI可选是否渲染注解

assets/webui/index.html

@@ -32,6 +32,7 @@
 				<button id="zoomInButton" class="icon-button" type="button" title="放大" disabled>+</button>
 				<button id="fitButton" class="button" type="button" data-short="宽" disabled>适宽</button>
 				<button id="fitHeightButton" class="button" type="button" data-short="高" disabled>适高</button>
+				<button id="annotationButton" class="button" type="button" data-short="注" title="渲染注解" aria-label="渲染注解" aria-pressed="true">注解</button>
 			</div>
 			<div class="tool-group">
 				<select id="pageExportFormat" class="format-select" title="单页格式" aria-label="单页格式" disabled></select>