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

[MaryammAli]

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

can i work on this issue
kindly assign
ETA 2hrs

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

[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.