Update rtl_ltr_linter.py

[duvvuvenkataramana]

What does this PR do?

Add resource(s) | Remove resource(s) | Add info | Improve repo

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[eshellman]

please explain what you've changed

[duvvuvenkataramana]

I updated in short form

[duvvuvenkataramana]

@eshellman

[duvvuvenkataramana]

Summary of Changes
Refactored rtl_ltr_linter.py for simplicity and maintainability—significantly reduced codebase size.

Improved documentation: added and clarified docstrings/comments for easier understanding and future contributions.

Enhanced path and error handling to increase reliability.

Strengthened regex and directionality detection to handle RTL/LTR issues more accurately.

Reworked issue reporting to follow a structured format compatible with GitHub Actions output.

Removed redundant/unused functions and optimized logic for better performance.

This update makes the linter more robust, user-friendly, and maintainable for the project.

@eshellman