chore: 初始化项目，搭建Go后端、React前端与Neutralino桌面壳

backend/build.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+DST=nex
+
+echo "Building $DST ..."
+go build -ldflags="-s -w" -o $DST ./cmd/nex
+chmod +x $DST
+echo "DONE!"