feat(theme): 自定义主题

resource/template/dashboard/setting.html

@@ -18,6 +18,10 @@
                     <option value="hotaru">CakeMine-Hotaru</option>
                 </select>
             </div>
+            <div class="field">
+                <label>自定义CSS</label>
+                <textarea name="CustomCSS" value="{{.Conf.Site.CustomCSS}}"></textarea>
+            </div>
             <button class="ui button" type="submit">保存</button>
         </form>
     </div>