Implement bucket bind CRUD operations and config loading, along with
CLI integration for listing, setting, and removing bucket bindings.

Add bucket init logic with directory structure creation and log macros
for tracing

Extract rola-vcs/internal_macros into shared utils crates
(shared_constants, shared_macros, space-system) and implement
the Bucket enum with async space management

Replace `copy_with_temp_rename` module with `test_sandbox` providing
automatic cleanup of test directories. Add `rt`, `rt-multi-thread`, and
`macros` tokio features.