Document platform-specific WiFi power management constants for ESP32, ESP8266, and Cyw43

[Copilot]

The WiFi power management constants (PM_NONE, PM_PERFORMANCE, PM_POWERSAVE) in network.WLAN were undocumented in reference stubs, and their platform-specific numeric values were not clarified.

Changes

• Enhanced reference/micropython/network/WLAN.pyi:

  • Added detailed docstring documenting PM constants with platform-specific values
  • Documented value discrepancy between ESP32 (0,1,2) and ESP8266 (0,2,1)
  • Added RP2 Pico W/Cyw43 values (16, 10555714, 17)
  • Included C constant mappings for ESP32 (WIFI_PS_NONE, WIFI_PS_MIN_MODEM, WIFI_PS_MAX_MODEM)
  • Recommended using symbolic constants for cross-platform portability

• Updated tests/quality_tests/feat_networking/check_network/check_wlan.py:

  • Added examples demonstrating symbolic constant usage

Example

import network

wlan = network.WLAN(network.STA_IF)

# Platform-portable approach (recommended)
wlan.config(pm=network.WLAN.PM_NONE)        # Disable power management
wlan.config(pm=network.WLAN.PM_PERFORMANCE) # Balanced mode
wlan.config(pm=network.WLAN.PM_POWERSAVE)   # Maximum power saving

# Platform-specific magic numbers (avoid)
wlan.config(pm=0xa11140)  # Only works on RP2 Pico W

Values verified against published stubs for v1.24.1+ across ESP32, ESP8266, and RP2 ports.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add powermanagement constants for ESPxxx and Cyw43</issue_title>
<issue_description>Document constants for ESPxxx and cyw43 in reference stubs

network.wlan

{ MP_ROM_QSTR(MP_QSTR_PM_NONE), MP_ROM_INT(WIFI_PS_NONE) },
{ MP_ROM_QSTR(MP_QSTR_PM_PERFORMANCE), MP_ROM_INT(WIFI_PS_MIN_MODEM) },
{ MP_ROM_QSTR(MP_QSTR_PM_POWERSAVE), MP_ROM_INT(WIFI_PS_MAX_MODEM) },

https://github.com/micropython/micropython/blob/2762fe680a03706d3c21efe51db9b1f8d193d2d0/ports/esp32/network_wlan.c#L774C1-L776C74</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add powermanagement constants for ESPxxx and Cyw43 #847

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[Josverl]

Please summarize the different platform values in a table rather than extensive text

[Josverl]

@copilot see comment above