Add a Snake minigame to the file transfer screen

A basic Snake minigame you can play while your game is downloading ModernsupersonicFanServ_ServerpackMega+ManiaMusicpack+TorturedPlanetAndMysticRealmRepacks-3.8.24b-fix.wad at 35 kB/s.

Also, this fixes sounds and closed captions not being updated in the connection screen, which was very annoying since the captions would never disappear there.

I'm putting the graphics here for convenience (Big thanks to Chrispy for the snake's sprites): Snake.pk3

changed the description

changed milestone to %2.2.4

added 114 commits

• 752b48de...28063301 - 112 commits from branch next
• 614f45b3 - Merge branch 'next' of https://git.magicalgirl.moe/STJr/SRB2.git into snake
• dc55ab9a - Use W_CachePatchLongName in Snake minigame

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changed milestone to %2.2.5

Maybe put the snake game in another file instead of in d_clisrv.c.

I intend to do that whenever I decide to make a refactoring branch for d_clisrv.c.

added 1 commit

• e6ffedbc - Fix food occasionally spawning inside the snake

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merged

mentioned in commit bc2edb2a