The run-tools.ps1 and run-tools.sh scripts now support running both
Rust binaries and shell scripts. They check dev_tools/scripts first,
then dev_tools/src/bin. Also added a simple HTTP preview script.
- Add project icon and badges to README
- Update crate description to "The Rust CLI Framework"
- Add table of contents and improve section organization
- Move guide.txt to resources directory and update version reference
- Add example-completion Cargo.lock for new example
- Remove unused main.rs file