Feat: Improve Question Discoverability with Tagging System

[SamuelWorld20]

Describe the feature

To improve question discoverability on UniCollab, a tagging system should be implemented. This would allow users to categorize questions with relevant keywords, making it easier to find specific information, discover related topics, and avoid duplicate questions. By providing tag suggestions, creating a hierarchical tagging system, and displaying tag popularity, UniCollab can enhance user experience, increase knowledge sharing, and reduce the number of duplicate questions.

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[SUGAM-ARORA]

@SamuelWorld20 Issue assigned to you