Co-authored-by: Matiss Janis Aboltins <matiss@mja.lv>

This PR adds types to the `crdt` directory to make the structure of the
merkle tree (really a merkle radix trie) clearer.

---------

Co-authored-by: Jed Fox <git@jedfox.com>
Co-authored-by: Matiss Janis Aboltins <matiss@mja.lv>

I noticed that:

- The web and electron versions of our `uuid` module both looked exactly
the same…
- …and deferred to the `uuid` package…
- …and the async version just called the sync API.

So now we will just use the `uuid` package directly everywhere.

Bundle sizes are unchanged but now we no longer pull in the
Electron-specific FS code on the web version

Another batch of `loot-core` migrated.

This PR converts everything (aside from electron) from CommonJS to ESM.
It is needed to reduce the changes that will happen during the migration
to Typescript (as TS does not play nice with CJS).

Basically:
- rewrite `require()` to `import`
- rewrite `module.exports` to `exports`
- introduce `ts-node` to run importers so we can convert them to TS too

Lastly, sorry for this larg-ish PR, not my preference but when I tried
to reduce its scope, I would end up with mixed commons/esm that was even
more tricky to handle.

*  (prettier) adding trailing commas

* More commas

*   upgrade eslint-plugin-import and fix issues

* Change import ordering

* style: enforce sorting of imports

* style: alphabetize imports

* style: merge duplicated imports

* style: enforce ordering of imports

* style: sort imports in loot-core

* style: sort imports in desktop-client

* style: sort imports in loot-design

* style: manual fixes