Use shortened preset fields in driver

Switch led-driver patterns and main loop to use compact preset keys (p, d, b, c, a, n1..n6) and remove unused settings defaults.

src/settings.py

@@ -14,13 +14,10 @@ class Settings(dict):
     def set_defaults(self):
         self["led_pin"] = 10
         self["num_leds"] = 50
-        self["pattern"] = "on"
-        self["delay"] = 100
-        self["brightness"] = 10
+      
         self["color_order"] = "rgb"
         self["name"] = f"led-{ubinascii.hexlify(network.WLAN(network.AP_IF).config('mac')).decode()}"
-        self["ap_password"] = ""
-        self["id"] = 0
+       
         self["debug"] = False
 
     def save(self):