Issue 23: Clone git marketplace templates with shallow clone and cache

[Nanle-code]

Labels: enhancement, templates

Description:
Marketplace entries use git URLs 1 but cloning may re-download every time.

Acceptance criteria:

Cache under ~/.starforge/template-cache/.
--force-refresh flag on new contract.
Files:

src/utils/templates.rs
src/commands/new.rs
TEMPLATE_MARKETPLACE.md

[jadonamite]

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

Hi maintainer I would love to work on this issue

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

[drips-wave]

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

🧑‍💻 @jadonamite: 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.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊