TerraFirmaCraft

• Add pl_pl localization, thanks to talerzyk from Discord.
• Fix a preservation exploit involving barrel racks.
• Fix some issues with mobs not being able / being ineffective at pathing up single block jumps. Note that this fix only applies to new, not existing, mobs. If you want to apply this fix to existing mobs, you can run some variant of the following command:

/data merge entity @e[limit=1, sort=nearest, type=tfc:grizzly_bear] {Attributes:[{Name: "forge:step_height_addition", Base: 0.5}]}