Refactor source to be in different modules

[Raiondesu]

Fixes #194 (WIP).

This PR is mostly here to spark conversation about the necessity of such changes and how much they impact the project itself.

EDIT: and I also needed a reason to get familiar with the source code. 😅

Changes

There seem to be no breaking changes, as all tests pass, and the "export" structure is preserved.

Modules

Split crank.ts into several modules:

• renderer
• context
• events
• elements

and extracted miscellaneous items into util.ts.

context and renderer are still far too large, in my opinion, so I guess I'll try to polish and split them up a bit more. Hence the "draft" status.

Adapted build process to be independent from the module structure.

Build artifacts

All distributed artifacts now rest in the dist folder, structured by their respective format.

For "cjs" and "esm" formats, the original module structure is now preserved for better tree-shaking.

Reordered some fields in package.json to achieve, I hope, better readability for contributors.

Website and examples

are still in their original place, as I can do nothing about it. 😅

[brainkim]

Closing as too far skewed. Again, I am a big fan of putting things in as few files and folders as possible, so if you would like to revisit refactoring let me know.

Thank you so much for the attempted contribution!