Turn on units of measure (BREAKING CHANGE) (#6343)

* Turn on uom checks

Signed-off-by: Nick Cameron <nrc@ncameron.org>

* Convert all lengths to mm for engine calls

Signed-off-by: Nick Cameron <nrc@ncameron.org>

---------

Signed-off-by: Nick Cameron <nrc@ncameron.org>

rust/kcl-lib/std/prelude.kcl

@@ -128,7 +128,7 @@ export END = 'end'
 export fn helix(
   /// Number of revolutions.
   revolutions: number(_),
-  /// Start angle (in degrees).
+  /// Start angle.
   angleStart: number(Angle),
   /// Is the helix rotation counter clockwise? The default is `false`.
   ccw?: bool,
@@ -383,3 +383,69 @@ export fn revolve(
   /// A named tag for the face at the end of the revolve.
   tagEnd?: tag,
 ): Solid {}
+
+/// Convert a number to millimeters from its current units.
+export fn toMillimeters(@num: number(mm)): number(mm) {
+  return num
+}
+
+/// Convert a number to centimeters from its current units.
+export fn toCentimeters(@num: number(cm)): number(cm) {
+  return num
+}
+
+/// Convert a number to meters from its current units.
+export fn toMeters(@num: number(m)): number(m) {
+  return num
+}
+
+/// Convert a number to inches from its current units.
+export fn toInches(@num: number(in)): number(in) {
+  return num
+}
+
+/// Convert a number to feet from its current units.
+export fn toFeet(@num: number(ft)): number(ft) {
+  return num
+}
+
+/// Converts a number to yards from its current units.
+export fn toYards(@num: number(yd)): number(yd) {
+  return num
+}
+
+/// Converts a number to radians from its current units.
+///
+/// ```
+/// exampleSketch = startSketchOn(XZ)
+///   |> startProfileAt([0, 0], %)
+///   |> angledLine(
+///     angle = 50,
+///     length = 70 * cos(toRadians(45)),
+///   )
+///   |> yLine(endAbsolute = 0)
+///   |> close()
+///
+/// example = extrude(exampleSketch, length = 5)
+/// ```
+export fn toRadians(@num: number(rad)): number(rad) {
+  return num
+}
+
+/// Converts a number to degrees from its current units.
+///
+/// ```
+/// exampleSketch = startSketchOn(XZ)
+///   |> startProfileAt([0, 0], %)
+///   |> angledLine(
+///     angle = 50,
+///     length = 70 * cos(toDegrees((PI/4): number(rad))),
+///   )
+///   |> yLine(endAbsolute = 0)
+///   |> close()
+///
+/// example = extrude(exampleSketch, length = 5)
+/// ```
+export fn toDegrees(@num: number(deg)): number(deg) {
+  return num
+}