Add type aliases for registries

Introduces `GlobalFunctionRegistry` and `GlobalAnalyzedRegistry` type
aliases to clarify the usage of `HashMap`s for storing global functions
and their analyzed versions. This change also refactors the
`LambdaCollector` and `Optimizer` to use these new aliases, improving
code readability and maintainability.

src/ast/compiler/specializer.rs

@@ -11,12 +11,12 @@ pub struct MonoCacheKey {
     pub arg_types: Vec<StaticType>,
 }
 
-pub type CompileFunc = Rc<dyn Fn(BoundNode, &[StaticType]) -> Result<(Value, StaticType), String>>;
+pub type CompileFunc = Rc<dyn Fn(Rc<BoundNode>, &[StaticType]) -> Result<(Value, StaticType), String>>;
 pub type RtlLookupFunc = Rc<dyn Fn(&str, &[StaticType]) -> Option<(Value, StaticType)>>;
 
 pub trait FunctionRegistry {
-    fn resolve(&self, addr: Address) -> Option<BoundNode>;
-    fn resolve_analyzed(&self, _addr: Address) -> Option<AnalyzedNode> {
+    fn resolve(&self, addr: Address) -> Option<Rc<BoundNode>>;
+    fn resolve_analyzed(&self, _addr: Address) -> Option<Rc<AnalyzedNode>> {
         None
     }
 }