chore(pack): drop FTB Quests, FTB Teams and FTB XMod Compat

FTB Teams was the only thing holding FTB Quests down -- FTB Quests' 1.21.1
build requires it, and its bytecode references dev/ftb/mods/ftbteams in 14
classes including the event handler, so it breaks at runtime without it. With
quests unused, the whole block goes. XMod Compat only bridged
Quests/Chunks/Ranks, all of which are now gone.

FTB Library stays because FTB Backups 3 builds its config UI on it
(Panel/Theme/Widget/ConfigGroup/ConfigValue/SNBTCompoundTag, 13 classes, and
it does not bundle them despite declaring only neoforge). Architectury API
stays because FTB Library references it in 47 classes.

Verified before removing: FTB Library and FTB Backups 3 reference ftbteams,
ftbquests and ftbxmodcompat in zero classes each, and nothing else in the pack
references them.

CurseForge-sourced mods drop from 9 to 5; pack is 146 mods. OPAC's built-in
party system is now the only one, so primaryPartySystem should be left at its
default rather than pointed at ftbteams.

pack.toml

@@ -6,7 +6,7 @@ pack-format = "packwiz:1.1.0"
 [index]
 file = "index.toml"
 hash-format = "sha256"
-hash = "80220fc3f737beda7794679fb8a18b70b2b68c5cd7f88b479bc0380e7311bb64"
+hash = "f8440954feca2fde012fe8cedb664a48aa3e08ae67ce00125aa7c5ea31d58c56"
 
 [versions]
 minecraft = "1.21.1"