refactor(deprecated): 迁移旧 API 至 deprecated 目录，保留兼容路径

Author: l246804

src/as-vue-plugin.ts

@@ -0,0 +1,24 @@
+import type { App, ObjectPlugin } from 'vue'
+import type { RouterPlugin } from '../plugin'
+import { prepareInstall } from '../prepare-install'
+import { setupPlugin } from '../setup-plugin'
+
+/**
+ * @deprecated
+ * Please use {@link withInstall} instead.
+ */
+export function asVuePlugin(plugin: RouterPlugin): RouterPlugin & ObjectPlugin {
+  return Object.assign(plugin, {
+    install(app: App) {
+      const router = app.config.globalProperties.$router
+      if (!router) {
+        throw new Error(
+          '[vue-router-plugin-system] Please install vue-router first.',
+        )
+      }
+
+      prepareInstall({ app, router })
+      setupPlugin({ router, plugin })
+    },
+  })
+}

src/create-vue-router-plugin.ts

@@ -0,0 +1,22 @@
+import type { App } from 'vue'
+import type { RouterPlugin } from '../plugin'
+import { asVuePlugin } from './as-vue-plugin'
+
+/**
+ * @deprecated
+ * Please use {@link RouterPluginInstall} instead.
+ */
+export interface VueRouterPlugin extends RouterPlugin {
+  /**
+   * Install the plugin.
+   * @param app vue app
+   */
+  install: (app: App) => void
+}
+
+/**
+ * @deprecated
+ * Please use {@link withInstall} instead.
+ */
+export const createVueRouterPlugin: (plugin: RouterPlugin) => VueRouterPlugin =
+  asVuePlugin