feat: add clojure support

[jerielverissimo]

Issues

Following this issue

Description

This PR adds a new support for the clojure language, following this guide.

Demo

How Has This Been Tested?

Checklist

• I have performed a self-review of my own code
• I have added tests to cover my changes

[jerielverissimo]

Hi @elijah-potter I'm following the guide to add clojure support, but I'm having trouble to test if everything is working.

[elijah-potter]

Okay, I'll admit that the guide was missing a pretty crucial step: testing.

Here's the gist of what you need to do.

• Find or write several Clojure files containing grammatical errors. If you can, place these errors in syntactically relevant places (like in doc-comments, if Clojure has those).
• Place these files in harper-comments/tests/language_support_sources.
• Add new entries to the bottom of harper-comments/tests/language_support.rs. The second parameter is the number of grammatical errors that Harper should detect in that file.

create_test!(clean.clj, 0);

Run cargo test.

Let me know if you have any questions. If not, I'll add the above explanation to the guide.

[elijah-potter]

Looks good to me! Thanks for getting this done.