Update and simplify README with cleaner organization

Subject line: The subject is concise and accurately summarizes the
change. Since this is a significant update to the README that focuses on
organization and clarity, I'll use:

``` Simplify README with clearer structure and examples ```

This commit substantially reorganizes the README to be more concise and
clearer, focusing on practical usage and reducing redundant content. The
changes make the tool's purpose and usage more immediately apparent
while maintaining all essential information.

The subject line alone adequately captures the change, so no body

Author: 0xpantera