Rename 3.0.0

[onatcipli]

This PR introduces several enhancements and additions to the Rename CLI Tool, focusing on the command options, platform support, and overall user experience. The changes aim to make the tool more versatile, user-friendly, and aligned with the latest Flutter standards.

Key Highlights:

• Introduced new command structures with getAppName, getBundleId, setAppName, and setBundleId.
• Implemented RenameCommandRunner class for running the rename command in the CLI tool.
• Updated and improved documentation for clarity, detail, and professionalism.
• Deprecated the --launcherIcon option.
• Various minor improvements and adjustments.

These updates aim to enhance the tool's functionality, usability, and accessibility, providing users with a more streamlined and intuitive experience. Looking forward to any feedback or suggestions for further improvements.

[onatcipli]

Hey @jpnurmi, I see that biggest contributor is you so that if you have any time, any reviews are welcome 😊