feat: add custom edge (#1061)

### What problem does this PR solve?
feat: add custom edge
feat: add flow card
feat: add store for canvas
#918 

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/flow/canvas/node/index.less

@@ -1,6 +1,6 @@
 .textUpdaterNode {
   // height: 50px;
-  border: 1px solid black;
+  border: 1px solid gray;
   padding: 5px;
   border-radius: 5px;
   background: white;
@@ -10,3 +10,12 @@
     font-size: 12px;
   }
 }
+.selectedNode {
+  border-color: #1677ff;
+}
+
+.handle {
+  display: inline-flex;
+  text-align: center;
+  // align-items: center;
+}