Warn when a pre-deploy directory upload will not be reused

[ryley-o]

Problem

abx storage upload <directory> followed by a normal directory deployment does not reuse the prior upload; the deploy command uploads the directory again. This is confusing on IPFS and can duplicate paid permanent storage on Arweave.

Desired outcome

Make the non-reuse behavior explicit and provide a supported reuse workflow if one is intended.

Acceptance criteria

• Warn before or after directory upload that deploy commands will upload their source independently.
• Point users to a supported locator-based workflow when reuse is possible; otherwise state that it is not supported.
• Do not warn for single-file upload intended for abx attach.
• Add CLI/help tests and update the storage guide.