[Haskell] Add exception handling

[geekygirlsarah]

Description

Exception handling for Haskell aren't presently on Code Thesaurus. This issue is to add that concept to the system.

Directions

• On the home page, on the right side (the reference sheet side), choose the language and version, and then the concept.
• The page says the data doesn't exist, but clicking the arrow for the template will provide the template and file for you to use.
• Save that file in /web/thesauruses/[language]/[version]/[concept].json.
• Fill out all of the "code" sections.
• Add in "not-implemented": "true" if the concept doesn't exist in the language. You can then delete the "code" line.
• Add in "comment": if you wish to explain something in the code
• Delete the "name": fields before your PR
• Save, commit your code, push to your fork, then make a PR.
• Watch the checks to make sure they all pass. If they don't, click on "Details" and it should tell you what to modify.

Claiming This Issue

Please leave a comment below so I can assign you to it. This is to prevent multiple people from working on the same issue.

Check out CONTRIBUTING.md for more information on how to contribute.

Check out https://docs.codethesaur.us/thesaurus/ for information on how Code Thesaurus works and how to add to the thesauruses.

Need Help?

Leave a comment on here with your question, or feel free to ask @geekygirlsarah on Twitter. You can also email coreteam@codethesaur.us too.

Thanks!

We really value and appreciate the additions people make to Code Thesaurus, no matter how large or small. So thank you for taking the time to work on this!

[cafce25]

Blocked on #653