In this commit, we've updated the kr package from version 0.1.0 to 1.0.0 in the Cargo.toml file, signifying a milestone update recognizing the project's stability and maturity.
This commit deletes the current codebase and configurations because we're switching to rust. This includes src/index.js, package.json, package-lock.json and .gitignore files. A refactor or rewrite app with updated dependencies and code style will be added afterwards.