feat(wifi): Allow configuration of wifi phy rate for AP and STA

[finger563]

Description

• Add wifi_phy_rate_t phy_rate to espp::WifiAp::Config and espp::WifiSta::Config which defaults to WIFI_PHY_RATE_MCS0_LGI - 6.5 - 13.5 Mbps.
• Add additional debug logs for consistency.
• Add format helper for libfmt printing of wifi_phy_rate_t
• Update example to have DEBUG logging on for WiFi AP.

Motivation and Context

Allows the user to set the PHY rate for the WiFi AP and STA configurations. This can be useful for optimizing performance or compatibility with specific devices.

How has this been tested?

• Build and run wifi/example on QtPy ESP32-S3.

Screenshots (if appropriate, e.g. schematic, board, console logs, lab pictures):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Hardware (schematic, board, system design) change
• Software change

Checklist:

• My change requires a change to the documentation.
• I have added / updated the documentation related to this change via either README or WIKI

Software

• I have added tests to cover my changes.
• I have updated the .github/workflows/build.yml file to add my new test to the automated cloud build github action.
• All new and existing tests passed.
• My code follows the code style of this project.

[github-actions]

✅Static analysis result - no issues found! ✅

[Copilot]

Pull Request Overview

This PR adds PHY rate configuration support to both WiFi Access Point and Station modes, allowing users to configure the transmission rate for optimization of performance or compatibility.

• Adds wifi_phy_rate_t phy_rate configuration option to both WifiAp::Config and WifiSta::Config structures
• Implements comprehensive format helpers for debug logging of PHY rate values
• Enhances debugging capabilities with additional logging statements

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
wifi_sta.hpp	Adds PHY rate configuration to STA config and enhanced debug logging
wifi_format_helpers.hpp	New format helper for libfmt printing of wifi_phy_rate_t enum values
wifi_ap.hpp	Adds PHY rate configuration to AP config with debug logging
wifi_example.cpp	Updates example to enable DEBUG logging for WiFi AP

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