feat(parser): add function to display AST statistics and fix Clippy warnings

[shahryarjb]

In this PR, I have aimed to update the Rust dependencies and resolve all warnings previously raised by Clippy in the earlier version.

In this version, we provide limited support for the following:

assert_eq!(parsed.functions, 2);
assert_eq!(parsed.classes, 1);
assert_eq!(parsed.debuggers, 2);
assert_eq!(parsed.imports, 2);
assert_eq!(parsed.trys, 0);
assert_eq!(parsed.throws, 0);

Note:

I have not changed the version to allow any necessary build adjustments to be made. If this needs to be addressed, please let me know so I can update it, or feel free to handle it yourself.

After merging this, a few functions for working with the AST will need to be implemented. I will proceed to work on examples for them.

Please squash this pull request as it contains too many commits.

Thank you,
Shahryar