Add Quest Category/Tag System

[Mkalbani]

Description

There is no way to categorize or filter quests by type, making it hard for players and the frontend to organize quests.

Expected Behavior

Quest creators should be able to assign categories (e.g. combat, exploration, crafting) at creation time.

Proposed Changes

• Add a string[] tags field to the quest struct
• Expose a getter to retrieve quests by tag

Acceptance Criteria

• Tags are stored on-chain per quest
• Getter function filters quests by category
• Tests cover tag assignment and retrieval

[nnennaokoye]

@nnennaokoye has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Please assign this issue to me. i've worked on similar implementation and i'll deliver quickly

ℹ️ Repo Maintainers: To accept this application, review their application or assign @nnennaokoye to this issue.

[ayshadogo]

@ayshadogo has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello Maintainer

I would like to work on this please

ℹ️ Repo Maintainers: To accept this application, review their application or assign @ayshadogo to this issue.

[drips-wave]

Congratulations, @ayshadogo! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @ayshadogo: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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