Merge branch...

Merge branch 'rnou/54-refactor-library-rpc-implementation-of-admire-deploy_adhoc_storage' into 'main'

Resolve "Refactor library RPC implementation of `admire::deploy_adhoc_storage`"

This MR moves the implementation of the RPC construction for
`ADM_deploy_adhoc_storage` to `admire::detail` in `impl.[ch]pp`
similarly to other RPCs already refactored. This includes changing
the C ADM_types to native C++ types.

It also provides a first implementation of the deployment mechanism
for GekkoFS.

Closes #54

See merge request !40