Solid Mobs - [Fabric & Forge]

- improved general runtime efficiency.
- Forge users can now join Fabric servers & have their settings sync correctly.*(Forge doesn't allow this the other way around :/)*
- added `/solid_mobs` command with options for all config settings to allow tweaking in-game *(server usage requires operator permissions)*.
- added `entityBlacklist` subcommand to tweak what collisions are enabled in-game.
- added `listRecentCollisions` subcommand to list recent entity collisions to aid with identifying and blacklisting unwanted collisions.
- added `platformMode` option when true mobs will only collide on their top side, and you can press crouch to fall through them like a platform.
- added `canNonSavingEntitesCollide` option to control collisions with non-saving/null entities *(occasionally used in mods for decorative or logical purposes, like `wall jump`)*.
- added `falling_block` entities to the hard coded blacklist, various reasons/issues.
- fixed a crash when trying to shove an entity after it has been removed.
- fixed a crash when certain entities landed on others.