Accept SAE password ids and peer mac addresses in CLI

[abeltrano]

Type

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

Side Effects

• Breaking change
• Non-functional change

Goals

• Allow SAE password ids and peer mac addresses to be configured via CLI.

Technical Details

• Move strings library to new CMake template.
• Add common helper function to convert a hex-encoded string to a container of uint8_t.
• Add parsing logic for SAE password id and peer mac address, replacing the single std::string with std::tuple<std::string, std::optional<std::string>,std::optional<std::string>>.
• Add helper function to parse a Ieee80211MacAddress from a string.
• Add checks in API impl for psk passphrase lengths.

Test Results

• All unit tests pass.
• Converted arguments for SAE passwords manually confirmed using a debugger.

Reviewer Focus

• None

Future Work

• Update labels for CLI options as the current, default ones aren't helpful.

Checklist

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