Add Banana Biome

[HexapodPhilosopher]

Brief Description of What This PR Does

Adds the banana biome as a rare replacement for coastal patches.
The biome has a much more yellow background, and 4 different banana-shaped chunks. Features a lot of marine snow, all of which is Nitroplasts.

Adds a new profile in biomes.json
Alters existing banana rock model, and adds 2 smaller models.

• Frequency of patch appearing needs to be reset to 1/100 before merging.

Related Issues

Progress Checklist

Note: before starting this checklist the PR should be marked as non-draft.

• PR author has checked that this PR works as intended and doesn't
  break existing features:
  https://wiki.revolutionarygamesstudio.com/wiki/Testing_Checklist
  (this is important as to not waste the time of Thrive team
  members reviewing this PR)
• Initial code review passed (this and further items should not be checked by the PR author)
• Functionality is confirmed working by another person (see above checklist link)
• Final code review is passed and code conforms to the
  styleguide.

Before merging all CI jobs should finish on this PR without errors, if
there are automatically detected style issues they should be fixed by
the PR author. Merging must follow our
styleguide.