[docs] Add sveltekit guide client block

Author: x0k

apps/docs/src/content/docs/integrations/sveltekit.mdx

@@ -74,5 +74,34 @@ The name of the `initForm` function result should match the name from the `actio
 
 ## Client
 
-## Disabled JavaScript
+On the client side you should call `useSvelteKitForm`.
+
+```typescript
+import type { PageData, ActionData } from './$types';
+
+const { form, mutation, enhance } = useSvelteKitForm(
+  meta<ActionData, PageData>(), "form", { /* form options */ }
+);
+```
+
+:::note
+
+The error type will be inferred from `ActionData` and the form data type from `PageData`.
+
+If you did not use `initForm` in the `load` function,
+the third generic parament of the `meta` function will be used as the form data type
+(the default is `SchemaValue`).
+
+:::
+
+According to Svelte documentation your form should always use `POST` requests.
+
+```svelte
+<form use:enhance method="POST" novalidate style="display: flex; flex-direction: column; gap: 1rem">
+  <FormContent bind:value={form.formValue} />
+  <button type="submit" style="padding: 0.5rem;">Submit</button>
+</form>
+```
+
+## Progressive enhancement