Add new setting for disabled feeds: Hide

[RachidTagzen]

When enabled, this feature "Hide disabled feeds" will automatically filter out and hide any disabled feeds from the feed list, providing a cleaner and more streamlined view for users. This enhancement will improve usability by reducing clutter and allowing users to focus only on active feeds.

NB : This feature works seamlessly as a complementary addition to the other committed features, such as Strikethrough and Custom color options Together, these options provide users with a comprehensive set of tools to customize and manage their feed list effectively, catering to different preferences and workflows.

Enabled	Disabled

[martinrotter]

Sorry, I checked this PR and cannot accept it because the filtering is done in a "weird" way by playing with indexes.

Filtering must be done in FeedsProxyModel which is specifically meant for these things, specifically the filterAcceptsRowInternal method.

Also, I planned to make feed filtering work the same way as article filtering which has this nice multi-selection filtering popup dialog in article toolbar.

So my other recommendation is this: when wanting to make some PR, please consult with me first to better align the PR with my view on the particular feature to be implemented etc. because there are many "internal" things I follow when programming RSS Guard which make code more simple, maintainable etc.

[RachidTagzen]

That's fine. Anyway I'm much more interested in the RTL feature than hiding disabled feeds.
Thank you for the feedback and the recommendation. I understand the importance of aligning PRs with your vision for RSS Guard, especially regarding internal structures for simplicity and maintainability.
To be honest, I'm still relatively new to the GitHub PR process and I may encounter challenges and misunderstandings, so I'm definitely open to feedbacks.
Also, I'd appreciate knowing the best way to consult with you before submitting a PR. Would you prefer communication through GitHub discussions, email, or another platform?
Thanks again.

[martinrotter]

Hi, well, yes, either create discussion topic here, or you can (maybe for faster response) contact me via RSS Guard discord channel.

https://discord.gg/7xbVMPPNqH

[martinrotter]

This was basically added