feat(wifi): Add get/set hostname to STA and AP (and menus)

[finger563]

Description

• Add get/set_hostname to espp::WifiSta and espp::WifiAp
• Add hostname (get/set) to espp::WifiStaMenu and espp::WifiApMenu

Motivation and Context

Allows run-time reconfiguration of hostname (which can also be set via LWIP menuconfig settings).

How has this been tested?

Build and run example on qtpy esp32s3 and test get/set hostname command to make sure it works - also tested with nslookup and ping on host computer.

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 introduces hostname configuration capabilities to both the WiFi station and access point components, exposing get/set operations at runtime via the CLI menus.

• Added get_hostname and set_hostname methods to WifiSta and WifiAp
• Exposed new hostname commands in WifiStaMenu and WifiApMenu
• Updated documentation comments around the new methods

Reviewed Changes

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

File	Description
wifi_sta_menu.hpp	Inserted hostname menu entries for STA get/set
wifi_sta.hpp	Defined get_hostname / set_hostname for STA
wifi_ap_menu.hpp	Inserted hostname menu entries for AP get/set
wifi_ap.hpp	Defined get_hostname / set_hostname for AP

Comments suppressed due to low confidence (1)

components/wifi/include/wifi_ap_menu.hpp:52

• There’s a missing comma between the command name and the lambda. It should be "hostname", [this] to compile correctly.

        "hostname" [this](std::ostream &out) -> void {