Declare parts of std in KCL rather than Rust (#5147)

Declare std in KCL

src/wasm-lib/kcl/std/math.kcl

@@ -0,0 +1,96 @@
+@no_prelude
+
+/// The value of `pi`, Archimedes’ constant (π).
+///
+/// ```
+/// circumference = 70
+///
+/// exampleSketch = startSketchOn("XZ")
+///  |> circle({ center = [0, 0], radius = circumference/ (2 * PI) }, %)
+///
+/// example = extrude(exampleSketch, length = 5)
+/// ```
+export PI = 3.14159265358979323846264338327950288_
+
+/// The value of Euler’s number `e`.
+///
+/// ```
+/// exampleSketch = startSketchOn("XZ")
+///   |> startProfileAt([0, 0], %)
+///   |> angledLine({
+///     angle = 30,
+///     length = 2 * E ^ 2,
+///   }, %)
+///   |> yLineTo(0, %)
+///   |> close()
+///
+/// example = extrude(exampleSketch, length = 10)
+/// ```
+export E = 2.71828182845904523536028747135266250_
+
+/// The value of `tau`, the full circle constant (τ). Equal to 2π.
+///
+/// ```
+/// exampleSketch = startSketchOn("XZ")
+///   |> startProfileAt([0, 0], %)
+///   |> angledLine({
+///     angle = 50,
+///     length = 10 * TAU,
+///   }, %)
+///   |> yLineTo(0, %)
+///   |> close()
+///
+/// example = extrude(exampleSketch, length = 5)
+/// ```
+export TAU = 6.28318530717958647692528676655900577_
+
+/// Compute the cosine of a number (in radians).
+///
+/// ```
+/// exampleSketch = startSketchOn("XZ")
+///   |> startProfileAt([0, 0], %)
+///   |> angledLine({
+///     angle = 30,
+///     length = 3 / cos(toRadians(30)),
+///   }, %)
+///   |> yLineTo(0, %)
+///   |> close()
+///
+/// example = extrude(exampleSketch, length = 5)
+/// ```
+@(impl = std_rust)
+export fn cos(num: number(rad)): number(_) {}
+
+/// Compute the sine of a number (in radians).
+///
+/// ```
+/// exampleSketch = startSketchOn("XZ")
+///   |> startProfileAt([0, 0], %)
+///   |> angledLine({
+///     angle = 50,
+///     length = 15 / sin(toDegrees(135)),
+///   }, %)
+///   |> yLineTo(0, %)
+///   |> close()
+///
+/// example = extrude(exampleSketch, length = 5)
+/// ```
+@(impl = std_rust)
+export fn sin(num: number(rad)): number(_) {}
+
+/// Compute the tangent of a number (in radians).
+///
+/// ```
+/// exampleSketch = startSketchOn("XZ")
+///   |> startProfileAt([0, 0], %)
+///   |> angledLine({
+///     angle = 50,
+///     length = 50 * tan(1/2),
+///   }, %)
+///   |> yLineTo(0, %)
+///   |> close()
+///
+/// example = extrude(exampleSketch, length = 5)
+/// ```
+@(impl = std_rust)
+export fn tan(num: number(rad)): number(_) {}