feat(nodes): add start node and create new node function

client/src/components/nodes/StartNode.tsx

@@ -0,0 +1,83 @@
+import { Edge, Handle, Node, NodeProps, Position } from "@xyflow/react";
+import { useTranslation } from "react-i18next";
+import {
+  HANDLE_STYLE_CONNECTED,
+  HANDLE_STYLE_DISCONNECTED,
+} from "./defaultHandleStyle";
+import { useState } from "react";
+
+interface StartNodeProps extends Node {
+  edges?: Edge[];
+}
+
+export default function StartNode({
+  id,
+  edges = [],
+}: NodeProps<StartNodeProps> & { edges?: Edge[] }) {
+  const { t } = useTranslation();
+  const isHandleConnected = edges.some(
+    (e: Edge) => e.source === id && e.sourceHandle === "1"
+  );
+  return (
+    <div
+      style={{
+        border: "0px solid",
+        borderRadius: 8,
+        backgroundColor: "white",
+        width: "248px",
+      }}
+    >
+      <div
+        style={{
+          display: "flex",
+          alignItems: "center",
+          paddingLeft: "12px",
+          height: "40px",
+          fontWeight: "600px",
+          fontSize: "16px",
+          gap: "12px",
+          backgroundColor: "#D4E0BD",
+          borderRadius: "8px 8px 0 0",
+        }}
+      >
+        <div
+          style={{
+            height: "24px",
+            width: "24px",
+            display: "flex",
+            alignItems: "center",
+            justifyContent: "center",
+          }}
+        >
+          <img
+            style={{ height: "16px", width: "18px" }}
+            src="/icons/node/home.svg"
+            alt="start logo"
+          />
+        </div>
+        {t("startNode")}
+      </div>
+      <div style={{ height: "1px", backgroundColor: "#E2E2E2" }}></div>
+      <div
+        style={{
+          display: "flex",
+          alignItems: "center",
+          padding: "12px",
+          fontSize: "14px",
+        }}
+      >
+        {t("startNodeDescription")}
+      </div>
+      <Handle
+        type="source"
+        position={Position.Bottom}
+        id="1"
+        style={
+          isHandleConnected
+            ? { ...HANDLE_STYLE_CONNECTED }
+            : { ...HANDLE_STYLE_DISCONNECTED }
+        }
+      />
+    </div>
+  );
+}