chore: add description field to FieldFormDialog

--story=1019827 --user=刘瑞斌 工具- 使用参数同启用参数一样增加 提示信息字段，目前参数没有说明，不方便使用 https://www.tapd.cn/62980211/s/1782428

Author: liuruibin

ui/src/views/tool/component/FieldFormDialog.vue

@@ -28,6 +28,17 @@
           <el-option v-for="item in typeOptions" :key="item" :label="item" :value="item" />
         </el-select>
       </el-form-item>
+      <el-form-item :label="$t('views.tool.form.toolDescription.label')">
+          <el-input
+            v-model="form.desc"
+            type="textarea"
+            :placeholder="$t('components.folder.descriptionPlaceholder')"
+            maxlength="128"
+            show-word-limit
+            :autosize="{ minRows: 3 }"
+            @blur="form.desc = form.desc?.trim()"
+          />
+        </el-form-item>
       <el-form-item :label="$t('views.tool.form.source.label')">
         <el-select v-model="form.source">
           <el-option :label="$t('views.tool.form.source.reference')" value="reference" />
@@ -64,6 +75,7 @@ const isEdit = ref(false)
 const form = ref<any>({
   name: '',
   type: typeOptions[0],
+  desc: '',
   source: 'reference',
   is_required: true,
 })
@@ -85,6 +97,7 @@ watch(dialogVisible, (bool) => {
     form.value = {
       name: '',
       type: typeOptions[0],
+      desc: '',
       source: 'reference',
       is_required: true,
     }