Added isEdited state extraction to CommentsInfoItem

[unleashedme]

Description

This PR adds the ability to extract the edited status of YouTube comments to support UI indicators in the main app.

• Added an isEdited() boolean to CommentsInfoItem.
• Updated the extraction logic to evaluate the published time payload to determine if the comment has been modified.
• This is the required backend implementation to resolve TeamNewPipe/NewPipe#13209.

Checklist

• I carefully read the contribution guidelines and agree to them.
• I have tested the API against NewPipe.
• I agree to create a pull request for NewPipe as soon as possible to make it compatible with the changed API.

[sonarqubecloud]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[TobiGr]

Thank you. Please fix the checkstyle errors (https://github.com/TeamNewPipe/NewPipeExtractor/actions/runs/27422345289/job/81074807973?pr=1513#step:6:65) and add corresponding tests to YoutubeCommentsExtractorTest.java. Our docs explain how to record mock files.