KCL: Keyword function calls for stdlib (#4647)

Part of https://github.com/KittyCAD/modeling-app/issues/4600

Adds support for keyword arguments to the stdlib, and calling stdlib functions with keyword arguments.

So far, I've changed one function: `rem`. Previously you would have used `rem(7, 2)` but now it's `rem(7, divisor: 2)`.

This is a proof-of-concept. If it's approved, we will:

1. Support closures with keyword arguments, and calling them
2. Move the rest of the stdlib to use kw arguments

src/wasm-lib/derive-docs/tests/array.gen

@@ -108,6 +108,10 @@ impl crate::docs::StdLibFn for Show {
         vec![]
     }
 
+    fn keyword_arguments(&self) -> bool {
+        false
+    }
+
     fn args(&self, inline_subschemas: bool) -> Vec<crate::docs::StdLibFnArg> {
         let mut settings = schemars::gen::SchemaSettings::openapi3();
         settings.inline_subschemas = inline_subschemas;
@@ -117,6 +121,7 @@ impl crate::docs::StdLibFn for Show {
             type_: "[number]".to_string(),
             schema: generator.root_schema_for::<[f64; 2usize]>(),
             required: true,
+            label_required: true,
         }]
     }
 
@@ -130,6 +135,7 @@ impl crate::docs::StdLibFn for Show {
             type_: "number".to_string(),
             schema,
             required: true,
+            label_required: true,
         })
     }