Surveyor Map Framework

Changes:

• Fix terrain arrays always loading in memory as int arrays
• Reimplement remapping terrain arrays without fully decompressing them
• [Breaks Save Format] remove default-trimming compression as it wasn't very good
• [Breaks Save Format] Use bit-identical representation for unsigned bytes/shorts/nibbles (thanks Jasmine!)
• [Breaks Save Format] Add unsigned nibble and short array compression for terrain using packed values (thanks Falkreon and Jasmine!)
• Reimplement toSingleLayer in a hopefully faster way.

Changelog: https://github.com/sisby-folk/surveyor/releases/tag/v0.1.0-beta.18