Revise readme for SimpleCrypt v1.5 updates

Updated documentation to reflect changes in SimpleCrypt v1.5, including new features, security improvements, and performance optimizations.

Rust Update!

From a bash script to a complete rust software, improved security and performance

updated readme.md

update simplecrypt.sh

updated readme.md

- Added details about automatic config file creation for Argon2 parameters.
- Updated features to reflect improved derive_key function and handling of Argon2id.
- Revised usage instructions for handling passwords and environment variables.
- Enhanced error handling section with solutions for common issues.
- Updated changelog for SimpleCrypt v1.3-beta.2, including fixes for terminal freeze and config file management.
- Added security section updates to reflect memory cleanup and password strength validation.
- Clarified encryption process steps and improved readability across the documentation.

name update :)

name update :)

name update :)

name update :)

name update :)