v0.3.0: 单 sources 入口 + 路径后缀覆盖约定

破坏性重构。框架对外只暴露一个 `sources` glob 入口,消费侧任何 .vue
都按文件路径后缀匹配同后缀覆盖:

- shrimp/components/<name>.vue 同后缀覆盖框架内置(login/layout/topbar/ShrimpTable/...)
- shrimp/components/fields/Field<X>.vue 注册类型 <x>(首字母小写)
- shrimp/module/<key>.vue 业务模块

变更:
- 删除 customFields / moduleSources / overrideField / registerField 旧入口
- 删除 fieldOverrides Map,字段表纯靠 glob 扫描注册
- 框架内 .vue 对可覆盖 peer 改用 defineAsyncComponent(resolveVue(...))
  (login → ShrimpLangSwitch / layout → sideM/navMenu/topbar/userbar/logo /
   ShrimpTable → ShrimpEditDrawer/ShrimpFilterDrawer/...)
- views/ 全部并入 components/,App.vue 上提到 src/ 根
- LangSwitch → ShrimpLangSwitch,PowerTree → ShrimpPowerTree
- module/FieldRelativeTime.vue → components/fields/FieldRelativeTime.vue
- module/user.vue 改用 #column-updatedAt slot 替代旧的 overrideField

字段类型约定从 'field' + Name 改为 lowercase-first(FieldString → 'string'),
内置和消费侧统一。

src/components/navMenu.vue

@@ -0,0 +1,37 @@
+<template>
+	<div v-if="navMenus.length <= 0" style="padding: 20px">
+		<el-alert :title="$t('base.noNavMenu')" center type="info" :closable="false"></el-alert>
+	</div>
+	<template v-for="navMenu in navMenus" v-bind:key="navMenu">
+		<el-menu-item v-if="!hasChildren(navMenu)" :index="'/' + navMenu.name">
+			<el-icon v-if="navMenu.icon">
+				<component :is="navMenu.icon || 'el-icon-menu'" />
+			</el-icon>
+			<template #title>
+				<span>{{ vueAdmin.t(navMenu.label) }}</span>
+			</template>
+		</el-menu-item>
+		<el-sub-menu v-else :index="'/' + navMenu.name">
+			<template #title>
+				<el-icon v-if="navMenu.icon">
+					<component :is="navMenu.icon || 'el-icon-menu'" />
+				</el-icon>
+				<span>{{ vueAdmin.t(navMenu.label) }}</span>
+			</template>
+			<NavMenu :navMenus="navMenu.children"></NavMenu>
+		</el-sub-menu>
+	</template>
+</template>
+
+<script lang="ts" setup>
+import { vueAdmin } from "../VueAdmin";
+defineProps({
+	navMenus: {
+		type: [Object],
+		required: true,
+	},
+});
+function hasChildren(item: any) {
+	return item.children && item.children.length > 0;
+}
+</script>