Adding a function into the built-ins functions to get the linked issue's information

[lokesh3097]

Description

Currently, the built-in functions can only give us information about whether there is a linked issue with respect to a Pull Request but cannot give any other information related to the linked issue.

So, it would be nice to have a functions or more than one function to that can give additional information about the linked issue.

Motivation

There is a requirement to automatically block a Pull Request when the linked issue doesn't yet have a label status: ready for dev.

This one is just start, there many be many things that the maintainers want to do to a Pull Request based on information related to a linked issue.

Proposed solution

One or more functions that can provide with the information related to the linked issue.

Alternatives considered

Custom code can be written to do this but it would be developer friendly if reviewpad can do this.

Additional context

[reviewpad]

Welcome @lokesh3097! Thank you so much for your first issue!

[reviewpad]

AI-Generated Summary: This issue concerns the lack of detailed information about linked issues in Pull Requests provided by built-in functions. The user proposes to create one or more functions that can access additional information about the linked issue, such as labels. This will allow maintainers to automatically block a Pull Request if the linked issue lacks a specific label, like status: ready for dev. The user considers that providing such functions would be more developer-friendly than writing custom code.