Remove WiFi station (client) support

- Drop station connect/status/credentials from wifi util and settings API
- Remove station activation from main
- Remove station UI and JS from index, settings template, and help.js
- Device settings now only configure WiFi Access Point

Co-authored-by: Cursor <cursoragent@cursor.com>

src/main.py

@@ -9,7 +9,6 @@ from microdot.session import Session
 from settings import Settings
 
 import aioespnow
-import network
 import controllers.preset as preset
 import controllers.profile as profile
 import controllers.group as group
@@ -27,9 +26,6 @@ async def main(port=80):
     print(settings)
     print("Starting")
 
-    sta = network.WLAN(network.STA_IF)
-    sta.active(True)
-
     # Initialize ESPNow singleton (config + peers)
     esp = ESPNow()