Add client cli tool

[abeltrano]

Type

• Bug fix
• Feature addition
• Feature update
• Documentation
• Build Infrastructure

Side Effects

• Breaking change
• Non-functional change

Goals

• Enable ad-hoc testing from the command-line.

Technical Details

• Add static library exposing command-line parsing and processing.
• Add linux binary netremote-cli that supports enumerating wi-fi access points (netremote-cli --server localhost:5048 wifi enumaps).

Test Results

• Validated cli tools connects to a remote service and executes the command to enumerate wifi aps.

Reviewer Focus

• None

Future Work

• When required arguments aren't specified, the program segfaults despite catching the exception that's being thrown by CLI11. This needs to be understood and fixed.
• Additional commands corresponding to existing APIs need to be implemented.

Checklist

• Build target all compiles cleanly.
• clang-format and clang-tidy deltas produced no new output.
• Newly added functions include doxygen-style comment block.