fix: entry point for npm package, localVarRequest types, typos in test imports

[nick22985]

In this pull request I have done the following:

• change the default entry point from dist/index.js to dist/tebex.js the index.js is a blank file and the actual entrypoint is tebex.js this allows the importing of node modules by doing import { Tebex } from "tebex-sdk-nodejs"; in projects when it went to index.js it did not work.
• fixed the type for localVarRequest defined this allows the importing import { localVarRequest } from "../../../tebex-request"; to work within the code base.
• added form & auth to localVarRequest type
• There were a few typos in the tests imports that stopped the from passing