feat: finalize comment section nodes

[LuanRT]

Description

This improves parsing in all nodes related to the comment section, implements missing properties and adds new functionality such as sorting the comment section using an existing Comments object.

A few examples:

import { Innertube, UniversalCache } from 'youtubei.js';

(async () => {
  const yt = await Innertube.create({ cache: new UniversalCache(), generate_session_locally: true });

  // Sort comment section using an existing 'Comments' object:
  const comment_section = await yt.getComments('somevideoid');
  const sorted_comments = await comment_section.applySort('NEWEST_FIRST');
  console.log(sorted_comments); 

  // This PR also includes a fix for the comment translation method:
  const top_thread = comment_section.contents.first();
  const translated_comment = await top_thread?.comment?.translate('ru'); // translates to Russian
  console.log(translated_comment);
})();

Closes #278

Type of change

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings