ui: split out safety ui into its own dedicated set of layers

Cargo.toml

@@ -25,6 +25,7 @@ wokwi = ["max-usb-power"]
 headless = []
 mpu = ["dep:mpu6050-dmp"]
 gps = ["dep:nmea"]
+oled = []
 demo = []
 
 [dependencies]
@@ -137,3 +138,4 @@ overflow-checks  = false
 
 [build-dependencies]
 image = "0.25.8"
+rmp = "0.8"