[Docs] Clean up README_TUNING.md

[windsonsea]

Perform cleanup actions to this tunning readme:

• Tweak long lines to easily maintain in future
• Use 1-2-3 list for steps
• Use a table to describe filename templates and examples
• Fix typos

[gemini-code-assist]

Code Review

This pull request cleans up the README_TUNING.md file, improving its readability by reformatting long lines, using numbered lists, and adding a table for file naming conventions. The changes make the documentation easier to follow. I've added a couple of suggestions to further improve the documentation by fixing a fragile link that points to a personal fork and correcting a typo in a code snippet. These changes will enhance the clarity and long-term maintainability of the tuning guide.

[gemini-code-assist]

Code Review

This pull request does a good job of cleaning up the README_TUNING.md file, improving its readability and maintainability. The use of a numbered list for steps and a table for file naming conventions are excellent changes. I've pointed out a couple of minor issues: a typo in an example code block and a link that points to a personal fork instead of the main repository. Addressing these will further improve the quality of the documentation.