Pre-Request Checklist

- [ ] I have checked that I am on the latest version of Terra.

• I have searched github for similar features requests, including closed ones, and found none.
• I believe this is within the scope of Terra.
• This feature request is for all of Terra, and isn't something that should be implemented by a pack or addon.

Feature Description

New TerraScript function palette that works like the block function, but specifies a palette ID rather than a block. Coordinates specified by the palette function would be buffered, then once a script has finished executed the palette would be applied in the same manner as if it was applied to regular terrain.