storage(lifecycle): use RegisterCLICommand pattern

[natalie-o-perret]

Description

Rewrites the lifecycle commands to use the struct-based RegisterCLICommand pattern, consistent with newer commands like cmd/aiservices/deployment/.

Changes:

• set, show, delete converted to typed structs with RegisterCLICommand
• Parent command simplified (redundant zone flag and helper func removed)

Checklist

(For exoscale contributors)

• Changelog updated (under Unreleased block, and add the Pull Request #number for each bit you add to the CHANGELOG.md)
• Testing

Testing

Build and full test suite pass (make build && make test-verbose). Lint clean.

[natalie-o-perret]

[SC-187336]

[quentinalbertone]

good idea ! Do you think that you can move the storage_bucket_lifecycle* into a subpackage ? You can find an example in the aiservices package

[natalie-o-perret]

good idea ! Do you think that you can move the storage_bucket_lifecycle* into a subpackage ? You can find an example in the aiservices package

I've just signed off, 🚇-typing, but the idea is that we can drive the people using "AI" for external contributions with the AGENTS.md, (#856) file sitting now at the root of the repo.

Ironically-speaking, I precisely gave the AI services as an example to develop rule for the LLM to grasp the structure / pattern, and it didn't pick it on its own 😂, I will further adjust the rules there so that next time it picks it up.

Good catch anyway, thanks!