Svelte Wasm Polyforms

This is the beginning of a sveltekit based tool dealing with polyforms using sveltekit. It currently only show the twelve pentaminos. Eventually the future solvers will be ported from typescript to assemblyscript using vector extension but I don't anticipate major improvement of speed. The speed will come with good data structure and algorithm.s

Next step. Dragging, flipping and rotating pentominos into a rectangle. For people to manually solve the 3x20, 4x15, 5x12, 6x10 tiling problems.

To see how to install sveltekit-README.md

implementation details:

A pentamino perimeter is generated and implemented as a polyline. This simplifies the code of the user interface.

The routine cacPerimeter in pentomino.ts which calcultates the perimeter will be a starting point to caculate n-ominos (now n-polyforms). I hope it is general enough to support other polyforms with a few tweaks. I discuss permiter calculation difficulty in the implementation note. Ii is a nice have but can be omitted because they to are not the easiest way to calculte polyforms.