fix: 优化 checkbox 组件鼠标显示效果

src/core/view/components/checkbox/index.vue

 <template>
   <uni-checkbox
+    :disable="disabled"
     v-on="$listeners"
     @click="_onClick">
     <div class="uni-checkbox-wrapper">
@@ -97,12 +98,17 @@ export default {
 	uni-checkbox {
 		-webkit-tap-highlight-color: transparent;
 		display: inline-block;
+    cursor: pointer;
 	}
 
 	uni-checkbox[hidden] {
 		display: none;
 	}
 
+	uni-checkbox[disabled] {
+		cursor: not-allowed;
+	}
+
 	uni-checkbox .uni-checkbox-wrapper {
 		display: -webkit-inline-flex;
 		display: inline-flex;
@@ -124,6 +130,10 @@ export default {
 		position: relative;
 	}
 
+	uni-checkbox:not([disabled]) .uni-checkbox-input:hover {
+		border-color: #007aff;
+	}
+
 	uni-checkbox .uni-checkbox-input.uni-checkbox-input-checked {
 		color: #007aff;
 	}