Add GET /v2/profile endpoint to channel-access-token.yml

[yumazak]

Feature Request

Is your feature request related to a problem? Please describe.
The channel-access-token.yml currently does not include the GET /v2/profile endpoint, which means auto-generated SDKs (like line-bot-sdk-ruby) lack a method to retrieve user profile information.

When we want to get user information (userId, displayName, pictureUrl, statusMessage) after LINE Login authentication, we have to manually implement HTTP requests since no SDK method exists for this endpoint.

Describe the solution you'd like
Please add the following endpoint to channel-access-token.yml:

• Endpoint: GET https://api.line.me/v2/profile
• Operation ID: getUserProfile
• Authentication: Bearer token (access token with profile scope)
• Response Model: GetUserProfileResponse
  • Required: userId (string), displayName (string)
  • Optional: pictureUrl (string), statusMessage (string)

Reference: https://developers.line.biz/en/reference/line-login/#get-user-profile

Describe alternatives you've considered
I've considered the following alternatives, but none are ideal:

1. SDK users manually implement requests using an HTTP client
2. Fork the SDK and extend it independently
3. Add methods manually without using auto-generation

By including it in the official OpenAPI specification, all SDKs can support this feature consistently.

Additional context
This endpoint is part of the LINE Login API and is widely used. Adding it would enable more complete LINE Login support across all SDKs, including line-bot-sdk-ruby.