Allow whitelisting/blacklisting of syncable features via config file

[LuminaSapphira]

Proposing a feature wherein certain gamestages, advancements, or skills/unlocks can be whitelisted or blacklisted from syncing. This could be accomplished by adding several list elements to the config file with associated boolean values determining whether the list should be considered a whitelist or a blacklist.

Thank you for the consideration!

(If you're busy I could potentially do this in a fork and do a PR)

[braingkk]

The 6 Botania Relic advancements are shared, meaning if you are in a team only one member can get each relic, and these are soulbound. would be great if they could be blacklisted by default or there could be advancement blacklist options like OP asked