Docs not correct for JSON in CheerioCrawler and other docs issues

[mnmkng]

The docs say that you need to add json to the additionalMimeTypes, but that's not true. I'd fix it, but we need to check it in HTTP crawler as well plus build and update the v3 of docs to release it, so I'm making an issue instead.

https://github.com/apify/crawlee/blob/e7b8c629bcaeb4570f41fcbbc27b870d83249f65/packages/http-crawler/src/internals/http-crawler.ts#L355

[mnmkng]

It seems that some functions are reported as methods and some as properties?

[B4nan]

It seems that some functions are reported as methods and some as properties?

This will be resolved by #1550, it depends on the signature, e.g. foo(): any vs foo: () => any.