feat: Create dropna.md documentation.

[DayneSorvisto]

Added some documentation for dropna based on references. Example compiled locally:

[kdpsingh]

Appreciate the PR! Thank you for contributing.

Our Contributor instructions are a bit out of date (which we need to fix). Because we are using Literate.jl to compile documentation, this actually needs to get converted to a .jl file and placed in the folder with all the other .jl files, with the .yml file updated to include this .jl file in the table of contents.

If you want to give it a shot, feel free to move it there and convert it into an actual .jl file that runs in Julia. If you're not sure what to do, I'm happy to have a colleague help out.

One other thing is that for the docs, the example should have more explanation and a tutorial style than what is there in the References. I'm happy to add some of that at the end, but the docs shouldn't just be a restating of the References.

[DayneSorvisto]

@kdpsingh thanks for the feedback. This is a great project and I'd be interested in contributing to documentation. Let me see if I can get a bit more familiar with Literate and the code base over next few days (I'll push a few more commits here to give it a shot) and then I may have some more questions or need some help I'll update here if I make progress.

[DayneSorvisto]

Hi @kdpsingh I added a basic tutorial and tried to add structure (summary, table of contents, examples, basic usage, advanced examples and additional help) for drop_na.

I wasn't sure how the tables are generated or if the formatting is correct (I created a generate markdown script in Julia but may look different locally).

[kdpsingh]

Hi @DayneSorvisto I will look through what you had prepared and will return to this in the future.