fix: handle decorators after type declarations

[Chakroun-Anas]

Issue: #20

Problem:

The parser crashes with Unexpected character '@' when a decorator appears immediately after an interface or type declaration, which is common in Angular and NestJS codebases.

Example:

interface User {
  id: number;
  name: string;
}

@Injectable()
export class UserService {
  getUser() { return null; }
}

Root cause

After parsing the interface closing }, the parser calls next() to advance to the @ character while still in type parsing mode. The getTokenFromCodeInType method didn't handle @ , causing it to fall through to the base parser which doesn't recognise decorators.

Solution

Added @ character handling in getTokenFromCodeInType method moving the position of the cursor and finishing by calling finishToken with the token type @

Testing

• All 188 tests pass (187 existing + 1 new)
• No breaking changes

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Latest commit: d80ccbd

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