[laxarxames] Add extractor

[aniolpages]

IMPORTANT: PRs without the template will be CLOSED

Description of your pull request and other information

Add extractor for La Xarxa+, a Catalan OTT with content from local TV stations

Template

Before submitting a pull request make sure you have:

• At least skimmed through contributing guidelines including yt-dlp coding conventions
• Searched the bugtracker for similar pull requests
• Checked the code with flake8 and ran relevant tests

In order to be accepted and merged into yt-dlp each piece of code must be in public domain or released under Unlicense. Check all of the following options that apply:

• I am the original author of this code and I am willing to release it under Unlicense
• I am not the original author of this code but it is in public domain or released under Unlicense (provide reliable evidence)

What is the purpose of your pull request?

• Fix or improvement to an extractor (Make sure to add/update tests)
• New extractor (Piracy websites will not be accepted)
• Core bug fix/improvement
• New feature (It is strongly recommended to open an issue first)

Copilot Summary

🤖 Generated by Copilot at 71229c9

Summary

🆕🎥🏀

Add a new extractor for laxarxames.cat, a Catalan sports streaming website. The extractor handles login and parses Brightcove video sources from the API. The extractor is defined in laxarxames.py and imported in _extractors.py.

LaXarxaMesIE
New extractor for sports site
Login, parse, download

Walkthrough

• Add a new extractor for laxarxames.cat (link, link)

• Import the LaXarxaMesIE class from laxarxames.py in _extractors.py (link)
• Create the laxarxames.py file and define the LaXarxaMesIE class (link)

[seproDev]

This should be everything from me.

[aniolpages]

Thank you again for your help, @seproDev !

[seproDev]

LGTM