NEZ-3057 feat：chart text 图表支持markdown格式

nezha-fronted/src/components/page/dashboard/dashboard.vue

@@ -648,6 +648,9 @@ export default {
             }
           }
         }
+        if (this.chart.type == 'text' && !this.chart.param.editorType) {
+          this.chart.param.editorType = 'richText'
+        }
       } else {
         this.rightBox.loading = true
         this.$get('visual/dashboard/chart/' + data.id).then(res => {
@@ -711,6 +714,9 @@ export default {
                 }
               }
             }
+            if (this.chart.type == 'text' && !this.chart.param.editorType) {
+              this.chart.param.editorType = 'richText'
+            }
             setTimeout(() => {
               this.$refs.addChartModal.isStable = 'stable'
             })