improve new draw logic

[felixroos]

The new draw logic now supports past present and future, allowing to pass a time range like [-2,2].
Each frame now queries only the incoming future time slice, which improves performance quite a lot.
When the pattern is updated, only the future is reevaluated, while the past remains as already played.

MiniRepl can now draw the first frame on load + has some handy options for documentation, see docs.mdx for more info.
The mini notation chapter is now fully visualized.
The Pattern core representation still has to be refactored to support context / metadata, so far the context uses a mutation as a workaround.