feat(docs): loadNuxt utility

docs/3.api/4.advanced/2.kit.md

@@ -74,9 +74,76 @@ export default defineNuxtModule<ModuleOptions>({
 
 [source code](https://github.com/nuxt/nuxt/blob/main/packages/kit/src/loader)
 
-- `loadNuxt(loadOptions)`
-- `buildNuxt(nuxt)`
-- `loadNuxtConfig(loadOptions)`
+Programmatic usage can be helpfull when you want to use Nuxt programmatically, for example, when building a CLI tool or test runner.
+
+### `loadNuxt`
+
+Load Nuxt programmatically
+
+#### Type
+
+```ts
+async function loadNuxt (loadOptions?: LoadNuxtOptions): Promise<Nuxt>
+
+interface LoadNuxtOptions extends LoadNuxtConfigOptions {
+  dev?: boolean
+  ready?: boolean
+  rootDir?: string
+  config?: LoadNuxtConfigOptions['overrides']
+}
+```
+
+#### Parameters
+
+loadNuxt uses [`c12`](https://github.com/unjs/c12/tree/main) under the hood, so it accepts the same options as `c12` with some additional options:
+
+##### `loadOptions`
+
+**Type**: `LoadNuxtOptions`
+
+**Default**: `{}`
+
+An object with the following properties:
+
+- `dev` (optional)
+
+  **Type**: `boolean`
+
+  **Default**: `false`
+
+  If set to `true`, Nuxt will be loaded in development mode.
+
+- `ready` (optional)
+  
+  **Type**: `boolean`
+  
+  **Default**: `true`
+  
+  If set to `true`, Nuxt will be ready to use after the `loadNuxt` call. If set to `false`, you will need to call `nuxt.ready()` to make sure Nuxt is ready to use.
+
+- `rootDir` (optional)
+
+  **Type**: `string`
+
+  **Default**: `null`
+
+  **Deprecated**: Use `cwd` option instead.
+
+  The root directory of the Nuxt project.
+
+- `config` (optional)
+
+  **Type**: `LoadNuxtConfigOptions['overrides']`
+
+  **Default**: `{}`
+
+  **Deprecated**: Use `overrides` option instead.
+
+  Overrides for the Nuxt configuration.
+
+### `buildNuxt(nuxt)`
+
+### `loadNuxtConfig(loadOptions)`
 
 ## Compatibility