Initial MVP commit

internal/platform/constants/conversion.go

@@ -0,0 +1,17 @@
+package constants
+
+func CelsiusToFahrenheit(c float64) float64 {
+	return c*9.0/5.0 + 32.0
+}
+
+func FahrenheitToCelsius(f float64) float64 {
+	return (f - 32.0) * 5.0 / 9.0
+}
+
+func KmhToMph(kmh float64) float64 {
+	return kmh * MphPerKmh
+}
+
+func MphToKmh(mph float64) float64 {
+	return mph * KmhPerMph
+}