refactor(projects): 注入全局常量：PROJECT_BUILD_TIME - 构建时间

build/define/index.ts

@@ -0,0 +1,8 @@
+import dayjs from 'dayjs';
+
+/** 项目构建时间 */
+const PROJECT_BUILD_TIME = JSON.stringify(dayjs().format('YYYY-MM-DD HH:mm:ss'));
+
+export default {
+  PROJECT_BUILD_TIME
+};

build/index.ts

@@ -1,4 +1,5 @@
 import viteEnv from './env';
 import plugins from './plugins';
+import define from './define';
 
-export { viteEnv, plugins };
+export { viteEnv, plugins, define };