Add Batch Quest Creation Function

[Mkalbani]

Description

Creating multiple quests requires separate transactions, which is expensive and slow during large game deployments.

Expected Behavior

Admins or quest creators should be able to create multiple quests in a single transaction.

Proposed Changes

function createQuestBatch(QuestParams[] calldata quests) external;

Acceptance Criteria

• Batch creation works for arrays of any valid size
• Gas usage is measurably lower than equivalent individual calls
• Tests cover batch success and partial failure scenarios

[Lynndabel]

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

Hello maintainer, i have gone through the task description and will like to work on this please. ETA: 6hours

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