Matching Tiles for Fun and Profit

• Overhauled the mesche build design to make it easier to manage
• Split out the substratic library into a separate repo: https://github.com/substratic/engine
• Added support for record field setters
• Added support for :rest arguments

The rules for playable tiles are:

• One side on the horizontal axis must not be adjacent to another tile
• There must not be another tile directly on top of it (the layer above)

The code for this stream can be found here:

• https://github.com/FluxHarmonic/crash-the-stack/commit/2b5379a1dd67cc068d607fde28f695821fed8008
• https://github.com/mesche-lang/compiler/commit/6c07a90ed2aa93e13c037afbcc5fb91fda190b36