Add format strings for title/album/artist

[ungive]

Add a title/album/artist formatting option, like in foo_discord_rich

Example: $if2([%vis title%],$if([%eng title%],$if2([%nat title%],%title%) '('%eng title%')',$if([%rom title%],$if2([%nat title%],%title%) '('%rom title%')',$if([%nat title%],%nat title% '('%title%')',[%title%]))))

See also:

• https://wiki.hydrogenaud.io/index.php?title=Foobar2000:Title_Formatting_Reference
• https://www.reddit.com/r/foobar2000/comments/1gh8bhb/comment/luwkqjn/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button
• https://github.com/TheQwertiest/foo_discord_rich/blob/44dbbe6178ce44ac1c8692db9883a19aab175eb8/foo_discord_rich/discord/presence_data.cpp#L279

[mynnshaw]

alternative examples i use:
$ifequal(%itunesadvisory%,1,{E} [%title%],[%title%])
$if([%sortgroup%],%sortgroup%,%album%)

very hacky but i have some specific needs :)