Introduce official ultrastar songformat v1.1.0

[marwin89]

What

Introduce official ultrastar songformat v1.1.0 to USDX. right now USDX doesn't support the standard format. You can find all information on website: https://usdx.eu/format/ or the spec on github: https://github.com/UltraStar-Deluxe/format/blob/main/spec.md

• Add #VERSION
• Mark as deprecated: #MP3
• Add #AUDIO
• Add #VOCALS
• Add #INSTRUMENTAL
• Add #TAGS
• Mark as deprecated #MEDLEYSTARTBEAT, #MEDLEYENDBEAT
• Add #PROVIDEDBY
• Multiple Entries in #GENRE #CREATOR #EDITION #LANGUAGE #TAGS seperated with "," comma

Why

• All singing games needs a shared song format, so players can easily switch their song collection between games.

Info

• Melody Mania, UltraStarPlay, Karedi, YASS reloaded already feature Songformat v1.1.0, Vocaluxe has already implemented 70%.

Blocks

• Bohning only introduces official song format v1.1.0 to USDB SYNCER, Ultrastar Manager and USDB.animux whey usdx features it as well.

[barbeque-squared]

For the last point

Multiple Entries in #GENRE #CREATOR #EDITION #LANGUAGE #TAGS seperated with "," comma

Is there any kind of expected search behaviour when comma's are present? Example:
#TAGS:Pony,Cringe
what's the expected behaviour if I start searching for ny,cr ? Or is that up for the implementation to decide?

(obviously a bit of a convoluted example, and once we search the field with the current search behaviour you will already find it when looking for pony cringe anyway. The spec does say that for most of these metatags they should probably be handled case-insensitive, but nothing for this kind of edge case -- or if it does I'm reading over it)