added hashtags for comments

[isaacblinder]

Your checklist for this pull request

🚨Please review the guidelines for contributing to this repository.

• Make sure you are requesting to pull a topic/feature/bugfix branch (right side). Don't request your master!
• Make sure you are making a pull request against the canary branch (left side). Also you should start your branch off our canary.
• Check the commit's or even all commits' message styles matches our requested structure.
• Check your code additions will fail neither code linting checks nor unit test.

Description

I added a feature so that users will be able to add hashtags to comments. Clicking on it will take you to the page with all of the posts containing that hashtag.

[Qolzam]

Great! I can see the hashtag for comment part is good. I appreciate your contribution 👍