Implement coercion of numeric types for ascription and arithmetic (off by default) (#6175)

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

rust/kcl-lib/src/execution/kcl_value.rs

@@ -15,7 +15,7 @@ use crate::{
     parsing::ast::types::{
         DefaultParamVal, FunctionExpression, KclNone, Literal, LiteralValue, Node, TagDeclarator, TagNode,
     },
-    std::StdFnProps,
+    std::{args::TyF64, StdFnProps},
     CompilationError, KclError, ModuleId, SourceRange,
 };
 
@@ -495,6 +495,7 @@ impl KclValue {
             None
         }
     }
+
     pub fn as_f64(&self) -> Option<f64> {
         if let KclValue::Number { value, .. } = &self {
             Some(*value)
@@ -503,6 +504,14 @@ impl KclValue {
         }
     }
 
+    pub fn as_ty_f64(&self) -> Option<TyF64> {
+        if let KclValue::Number { value, ty, .. } = &self {
+            Some(TyF64::new(*value, ty.clone()))
+        } else {
+            None
+        }
+    }
+
     pub fn as_bool(&self) -> Option<bool> {
         if let KclValue::Bool { value, meta: _ } = &self {
             Some(*value)