* Remove DefaultConstructorFunction
* Modify class parameters; update semantic analysis
- Use ClassDeclarationParameter for class decls vs Identifiers
- Update ScopableName to have equality for constructors and unscoped
function calls
- Update SemanticAnalyzer (self referencing base class, no ctor)
- Update, add tests
* Semantic updates; debug messaging updates
- Ensure base class is constructable
- Various fmt implementations for debugging
* Address self-review comments
* Add Report.debug
* Implement function call scoping
* Implement variable scoping
- Rename `Identifier::scope` to `calling_scope`, and concatenate the identifier scope into `name` if necessary.
- Track current scope in SemanticAnalyzer, similar to UserFunctionVisitor.
- Use current scope in SemanticAnalyzer when visiting identifiers.
* Update grammar for `::identifier` global scoping
* Introduce ScopableName for function resolution
* Address review comments
- Check for display_debugs missing
* Add ScopableName for identifier resolution
* Some cleanup
- Remove `Identifier::calling_scope`, as it is tracked in the semantic
analyzer
- Refactor `ScopeName::exists` to `global` for better clarification of
its use
- Removed `X::maybe_scoped_string/name`
* Address self-review comments
* Rename `Function::module_name` to `scope`
