Extract hardcoded UI strings in create-form.tsx into a central copy module (i18n prep)

[Austinaminu2]

Description

`app/app/create/create-form.tsx` has 10+ literal UI strings (labels, help text, validation messages) inline in JSX, which blocks any future translation/i18n work.

Location

`app/app/create/create-form.tsx`

Task

Extract the hardcoded strings into a central copy constants module (e.g. `lib/copy/create-form.ts`), and reference them from the component, as a first step toward i18n-readiness (no actual translation infrastructure required for this issue).

Good for contributors because

Mechanical extraction task with a clear before/after; establishes a pattern other components can follow later.

[Joel234-png]

@Joel234-png has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hey maintainer, I'd like to show you what am capable of doing. Kindly assign this to me.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Joel234-png to this issue.

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Congratulations, @Joel234-png! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @Joel234-png: 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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This issue has been completed by @Joel234-png as part of the Stellar Wave Program's 8th Wave 🥳

😎 @Joel234-png: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

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