docs(app-invite): fix import paths

Author: ping-maxwell

apps/docs/content/docs/plugins/app-invite.mdx

@@ -29,7 +29,7 @@ The App Invite plugin enables you to invite users to your application through em
 
     ```ts title="auth.ts"
     import { betterAuth } from "better-auth"
-    import { appInvite } from "better-auth/plugins" // [!code highlight]
+    import { appInvite } from "@better-auth-kit/app-invite" // [!code highlight]
 
     export const auth = betterAuth({
         // ... other config options
@@ -52,7 +52,7 @@ The App Invite plugin enables you to invite users to your application through em
 
     ```ts title="auth-client.ts"
     import { createAuthClient } from "better-auth/client"
-    import { appInviteClient } from "better-auth/client/plugins" // [!code highlight]
+    import { appInviteClient } from "@better-auth-kit/app-invite/client" // [!code highlight]
 
     const authClient = createAuthClient({
         plugins: [
@@ -98,7 +98,7 @@ This is only required for personal invites. Sharing public invitations is up to
 
 ```ts title="auth.ts"
 import { betterAuth } from "better-auth";
-import { appInvite } from "better-auth/plugins";
+import { appInvite } from "@better-auth-kit/app-invite";
 import { sendAppInvitation } from "./email";
 
 export const auth = betterAuth({