docs: update Snaplet instructions (#26328)

* update snaplet docs

* typo

* format

---------

Co-authored-by: Charis Lam <26616127+charislam@users.noreply.github.com>

apps/docs/content/guides/cli/seeding-your-database.mdx

@@ -53,7 +53,7 @@ COPY countries (name, code) FROM 'seed/countries.csv' WITH (FORMAT csv);
 You can generate seed data for local development using [Snaplet](https://www.snaplet.dev/).
 
 If this is your first time using Snaplet to seed your project, you'll need to setup Snaplet
-for your project with `npx snaplet setup`, and follow the interactive prompts. `snaplet setup`
+for your project with `npx @snaplet/seed init`, and follow the interactive prompts. The command
 will look at your database and its structure, and use it to generate the configuration files
 and assets needed by `@snaplet/seed`.
 
@@ -61,33 +61,39 @@ Suppose you have a database with the following schema:
 
 ![An example schema](/docs/img/guides/cli/snaplet-example-schema.png)
 
-You can use the Snaplet configuration file `seed.mts` to define the values you want to generate. For example
+You can use the seed script example generated by Snaplet `seed.ts` to define the values you want to generate. For example:
 
 - A `Post` with the title `"There is a lot of snow around here!"`
 - The `Post.createdBy` user with an email address ending in `"@acme.org"`
 - Three `Post.comments` from three different users.
 
-```ts seed.mts
+```ts seed.ts
 import { createSeedClient } from '@snaplet/seed'
 import { copycat } from '@snaplet/copycat'
 
-const seed = await createSeedClient()
+async function main() {
+  const seed = await createSeedClient({ dryRun: true })
 
-await seed.posts([
-  {
-    title: 'There is a lot of snow around here!',
-    createdBy: {
-      email: (ctx) =>
-        copycat.email(ctx.seed, {
-          domain: 'acme.org',
-        }),
+  await seed.Post([
+    {
+      title: 'There is a lot of snow around here!',
+      createdBy: {
+        email: (ctx) =>
+          copycat.email(ctx.seed, {
+            domain: 'acme.org',
+          }),
+      },
+      Comment: (x) => x(3),
     },
-    comments: (x) => x(3),
-  },
-])
+  ])
+
+  process.exit()
+}
+
+main()
 ```
 
-Running `npx tsx seed.mts > supabase/seed.sql` generates the relevant SQL statements inside your `supabase/seed.sql` file:
+Running `npx tsx seed.ts > supabase/seed.sql` generates the relevant SQL statements inside your `supabase/seed.sql` file:
 
 ```sql
 -- The `Post.createdBy` user with an email address ending in `"@acme.org"`
@@ -99,7 +105,7 @@ INSERT INTO "Post" (title, content, createdBy) VALUES (
   "Lorem ipsum dolar",
   1)
 
---- Three `Post.comments` from three different users.
+--- Three `Post.Comment` from three different users.
 INSERT INTO "User" (name, email) VALUES ("Stephanie Shadow", "shadow@domain.com")
 INSERT INTO "Comment" (text, userId, postId) VALUES ("I love cheese", 2, 1)
 
@@ -111,6 +117,6 @@ INSERT INTO "Comment" (text, userId, postId) VALUES ("Actually, that's not corre
 ```
 
 Whenever your database structure changes, `@snaplet/seed` will need to be regenerated so that it is
-in sync with your new database structure. You can do this by running `npx snaplet generate`.
+in sync with your new database structure. You can do this by running `npx @snaplet/seed sync`.
 
-For more information, check out Snaplet's [seed documentation](https://docs.snaplet.dev/core-concepts/seed)
+For more information, check out Snaplet's [seed documentation](https://docs.snaplet.dev/seed/integrations/supabase)