chore: Move CliCommand::run -> CliArgs::run; do not mutate the configuration

This way CliArgs::run has access to all command line parameters.
Avoided mutating the CliArgs (or rather CliCommand) structure here,
because doing so is simply bad style. There is no good reasoning for
why this function should mutate CliCommand, except for a bit of
convenience.

rosenpass/tests/integration_test.rs

@@ -104,8 +104,7 @@ fn run_server_client_exchange(
     .unwrap();
 
     std::thread::spawn(move || {
-        cli.command
-            .run(Some(
+        cli.run(Some(
                 server_test_builder
                     .termination_handler(Some(server_terminate_rx))
                     .build()
@@ -122,8 +121,7 @@ fn run_server_client_exchange(
     .unwrap();
 
     std::thread::spawn(move || {
-        cli.command
-            .run(Some(
+        cli.run(Some(
                 client_test_builder
                     .termination_handler(Some(client_terminate_rx))
                     .build()