refactor: refactored lexer to use logos

[cykna]

Summary

This PR simplifies the lexer by rewriting it by using logos library(AI Helped PR).

Scope

• The lexer changed to use logos library

Validation

List the commands, tests, or manual checks you ran.

# example
make test

Documentation Impact

• No documentation changes were needed
• I updated the relevant documentation

Checklist

• My change is focused and reviewable
• I performed a self-review
• I added comments only where they help explain non-obvious logic
• I added or updated tests when applicable
• I ran the validation listed above
• I used the existing issue/PR templates where applicable

Related Issues

Closes N/A