Add FILE line to Cuefile to include file path for each track

[presentformyfriends]

Fixes #13321

This PR adds a FILE line to the Cuefile to show a filepath for each track (see issue for more information).

[acolombier]

Thanks for the contribution, as @fwcd suggested, it would be great to make that an option. To do so, you could add a boolean to EngineRecord (like m_bCueUsesFileAnnotation), and initialise it in the EngineRecord::updateFromPreferences, using m_pConfig->getValue().
You can use Qt Designer to edit src/preferences/dialog/dlgprefrecorddlg.ui and add the logic in src/preferences/dialog/dlgprefrecord.cpp to ahndle the preference edition. Happy to do that part if you would like me to.

[ronso0]

Just a word on Qt Designer: that potentially rearranges the .ui files (for no reason) which produces a unreviewable diff.
If that happens please resort to editing the ui file manually in a text editor.

[presentformyfriends]

@ronso0 Thanks for the tip, I will pay attention to the .ui files order and will edit manually if need be

[presentformyfriends]

@acolombier Quick question, I just read in the Developer Guidelines to prefer merging over rebasing as rebasing apparently causes problems. I did not know this, and can't remember if I rebased or not. Is there a way for me to check if I rebased? Sorry if this is a dumb question. Thanks!

[JoergAtGithub]

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[ronso0]

@presentformyfriends Merging is preferred becasue rebasing rewrites the commit history and may detach review comments (which could mean a lot / everything hd to be reviewwd again)

Though, for this minimal PR that's irrelevant IMO.

[presentformyfriends]

Thanks @JoergAtGithub just signed it!

Welcome at Mixxx! As a first-time contributor we need you to sign the

[presentformyfriends]

Got it, good to know!

Merging is preferred becasue rebasing rewrites the commit history and may detach review comments (which could mean a lot / everything hd to be reviewwd again)

Though, for this minimal PR that's irrelevant IMO.