docs: fix broken link and update join documentation

[johanroelofsen]

If you have any suggestions how to best check / generate the tsdoc locally, I'm happy to learn.
For instance I think the @link of the join in dataframe should be JoinBaseOptions instead of JoinOptions but it did not find a easy way to check this myself

[universalmind303]

Thanks @johanroelofsen. You can run the docs locally yarn typedoc then opening up docs/index.html in your browser to view the docs locally. I primarily use the vscode typehints as a guide. If the docs look correct in your editor's typehints, likely they will end up correctly in typedoc.

[johanroelofsen]

Thanks @johanroelofsen. You can run the docs locally yarn typedoc then opening up docs/index.html in your browser to view the docs locally. I primarily use the vscode typehints as a guide. If the docs look correct in your editor's typehints, likely they will end up correctly in typedoc.

Thanks for the clear explanation