Load local lyrics from .txt files

[lucas-mior]

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.
• I optionally donated to support the Fossify mission.

Feature description

Be able to display lyrics from txt file with the same name as the music file.

Why do you want this feature?

I already have most of my music with lyrics (thanks to ncmpcpp) in txt files.
Unfortunately, android makes it extremely painful to open any app that shows txt contents, and even if it wasn't, they would not be synced with the current music that is playing.

Additional information

Related to VinylMusicPlayer/VinylMusicPlayer#816

[Aga-C]

It's a duplicate of #39.

[lucas-mior]

It is not a duplicate. #39 is about synced lyrics (.lrc format).
This one is about plain text lyrics, which should be much simpler to implement.

[Aga-C]

We have no lyrics support at all, so I don't see a reason to keep two separate requests for simpler and more advanced implementation of basically the same feature.