correctly initialize the `TypeChecker` with argument types during
macro expansion.
- Refactor `Specializer::compile` to perform type checking with provided
arguments before specialization and to correctly extract the return
type.
- Enhance the `Dumper` to introspect and display specialized closure
bodies.
- Update `LambdaCollector` to use `BoundNode` consistently.
- Modify `TypeChecker` to accept and inject specialized argument types
for lambdas.
Michael Schimmel