Update KCL docs (#634)

Includes new 3D assets for KCL exports, because Katie fixed a bug in the engine around importing then exporting. These examples previously failed to export.

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: zoo-github-actions-auth[bot]

content/kcl-test-outputs/models/serial_test_example_fn_std-clone9_output.gltf

@@ -41,5 +41,8 @@ Valid properties are:
   - Accepted values: `mm`, `cm`, `m`, `in` (inches), `ft` (feet), `yd` (yards).
 - `defaultAngleUnit`: the default angle unit to use for numbers declared in this file.
   - Accepted values: `deg` (degrees), `rad` (radians).
+- `experimentalFeatures`: how experimental features are handled within this file.
+  - Accepted values: `allow` (experimental features can be used freely), `warn` (experimental features
+  cause a warning), `deny` (the default, experimental features cause an error).
 
 These settings override any project-wide settings (configured in project.toml or via the UI).

content/kcl-test-outputs/models/serial_test_example_fn_std-sketch-revolve11_output.gltf

@@ -31,8 +31,6 @@ rem(
 ### Examples
 
 ```kcl
-import rem from "std::math"
-
 assert(rem(7, divisor = 4), isEqualTo = 3, error = "remainder is 3")
 assert(rem(-7, divisor = 4), isEqualTo = -3, error = "remainder is -3")
 assert(rem(7, divisor = -4), isEqualTo = 3, error = "remainder is 3")