Add unique beacon and join/leave/change sounds in lobby

[Porenutak]

Sound file MULTI1.WAV is not used anywhere and there for can be used as becon sound instead of CHAT1.WAV

[PunkPun]

Ah, it seems I forgot to leave a comment here.

I dunno when and if #6246 is going to get implemented, but it would be good to think about the sounds d2k should use. It would not be great if this sound overlapped with join / leave

[Porenutak]

I dunno when and if #6246 is going to get implemented, but it would be good to think about the sounds d2k should use. It would not be great if this sound overlapped with join / leave

@pchote suggested on discord that it should be added in separate PR. But I need to by this PR merged first, because I wanna use new beacon sound also for joining/leaving

[PunkPun]

my entire point that these things should have unique sounds. I think beacon and join/leave matching sounds would be confusing to say the liest

[Porenutak]

As you suggested here:
#6246 (comment)

I would like to go
For Join lobby: CHAT1.WAV

CHAT1.ZIP

For leaving lobby: CHAT1.WAV but reversed (Can ORA reverse sound?)
CHAT1_REVERSE.zip

and for chat it self ENDLIST1.WAV or SIDEBAR1.WAV
or just stay with CHAT1.WAV

ENDLIST1.ZIP
SIDEBAR1.ZIP

[Porenutak]

Added lobby sounds:
Join: CHAT1.WAV
Leave: CHAT1REVERSE.WAV
Options: SIDEBAR1.WAV

Know issue:
Because of Default variant in notification definition I cannot use nameming convention in bits folder for CHAT1REVERSE

[PunkPun]

LGTM

[PunkPun]

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