Explore: bundle size is too large and tsdx doesnt support multientry

[dxinteractive]

• Treeshaking is not working properly
• Moving to multi entry imports would be a big win. The codebase is suitable to be split like this, and doesnt rely on treeshaking.
• Ditch tsdx and try using something like https://github.com/rollup/rollup-starter-lib/blob/typescript/rollup.config.js

// proposal
import {array} from 'dendriform';
// changes to
import {array} from 'dendriform/array';

[dxinteractive]

Also explore making some larger features opt-in, such as maybe only shipping history-based code when enableHistory() is imported and called

[dxinteractive]

Issues

• Export submodules instead of all components in the root jaredpalmer/tsdx#961
• Better Pre-shaking support (multi-entry) jaredpalmer/tsdx#365
• https://github.com/VirtusLab-Open-Source/formts/pull/83/files