Added admin cli command tool; removed previous key_attestation_cmd tool

[alsala]

Implemented interactive CLI tool for managing Vela components at runtime. It connects to the Manager's admin server over TCP and lets operators query version info, read and change log levels on both Manager and Executor, and request key attestations from the Executor.

[saratnt]

In the admincli, it would be nice to have a "Back" command in submenus, so the user can go back to the parent menu in case of an error in the command selection. In addition, when in a submenu a wrong choice is selected (eg 4 for target), now it returns automatically to the parent menu, but it would be nice to stay in the same menu and to give the user another possibility.

[saratnt]

"HCCE Manager" => It's Vela now
Same comment at line 31

[alsala]

Done

[alsala]

In the admincli, it would be nice to have a "Back" command in submenus, so the user can go back to the parent menu in case of an error in the command selection. In addition, when in a submenu a wrong choice is selected (eg 4 for target), now it returns automatically to the parent menu, but it would be nice to stay in the same menu and to give the user another possibility.

Agree, modified admincli tool accordingly.