[DOCS] Typo in `SlashCommand` TS types

Question

### Documentation Type

Typo or formatting issue

### Documentation Location

@anthropic-ai/claude-code/sdk.d.ts

### Section/Topic

TypeScript types

### Current Documentation

```ts
export type SlashCommand = {
    name: string;
    desciption: string;
    argumentHint: string;
};
```

### What's Wrong or Missing?

`desciption` should be `description`

### Suggested Improvement

`desciption` should be `description`

### Impact

High - Prevents users from using a feature

### Additional Context