nodejs: add tests to library (#7694)

* nodejs: add tests to library

* new tests

* remove message splitting

* fix race

* docs

* replace extract-zip with yauzl that it wraps (high severity issue)

* fix ci tests

* skip server tests on macos and win unless SMP_SERVER is set

* fix win test

* fix win test

---------

Co-authored-by: Evgeny @ SimpleX Chat <259188159+evgeny-simplex@users.noreply.github.com>

packages/simplex-chat-nodejs/docs/core.Function.loadLibrary.md

@@ -8,7 +8,7 @@
 
 > **loadLibrary**(`backend`): `Promise`\<`void`\>
 
-Defined in: [src/core.ts:13](../src/core.ts#L13)
+Defined in: [src/core.ts:13](../core.ts#L13)
 
 Resolve (downloading on first use) and load libsimplex for the backend.
 One libsimplex per process: the Haskell runtime is initialized once, and another backend is rejected.