ESM module export

[BANOnotIT]

This PR should closes #816, #806, and #573

Auxiliary materials:

1. First mention of package.json#module in DRAFT EP
2. Final EP DRAFT mentioning type=module and .mjs instead
3. Webpack 4 usage of package.json#module, #browser and #main
4. TypeScript's behaviour "node16"

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Name	Status	Preview	Comments	Updated (UTC)
reatom	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 3, 2024 7:10pm

[BANOnotIT]

Initial confusion is likely to be caused by how microbundle handles ESM building by assuming everything in package.json#module is ESM. But now it checks for package.json#type also.

[Akiyamka]

How esbuild read package.json https://esbuild.github.io/api/#platform

[artalar]

@BANOnotIT if this is ready - merge it.

[BANOnotIT]

@artalar Still can't merge it myself