Debugger testing

[andrewdavidmackenzie]

At code level via API and messages

At CLI level using CLI crate?

• cli_debug_client @47%
• cli_debug_server @ 19%
• debug_server_message @ 22%

Unit tests for- runtime_messages @ 28% while at it.

[andrewdavidmackenzie]

• enter to have last command repeated and check output is the same
• comment with an int param like step?
• set breakpoints using each of the variants of breakpoint spec and check the list of breakpoints is correct
• inspect using each of the different specs and check the list output is correct
• invlaid command and check error output is correct
• use help command
• review the list of commands and add a test for each. Missing were f, h, s, v, _
• list blocks