add github actions workflows

[denversc]

This PR introduces GitHub Actions workflows for continuous integration and lints the workflows themselves. It also includes a minor refactor to the TUI input handling to resolve Clippy warnings.

Highlights

• CI Workflows: Added a rust.yml workflow to perform builds, tests, formatting checks, and Clippy linting on every pull request.
• Workflow Linting: Introduced actionlint.yml and ratchet.yml to ensure GitHub Actions workflows follow best practices and have their action versions pinned to specific SHAs.
• TUI Refactor: Refactored the event loop in rutt-tui/src/main.rs to address clippy::collapsible_if warnings by using if let chains.
• Action Pinning: All GitHub Actions used in the workflows are now pinned to specific SHAs for improved security and reproducibility.

Changelog

4 files affected

• actionlint.yml: Added workflow to lint GitHub Actions.
• ratchet.yml: Added workflow to ensure action versions are pinned to SHAs.
• rust.yml: Added workflow for Rust CI (build, test, fmt, clippy).
• main.rs: Refactored input handling to fix Clippy warnings.

[gemini-code-assist]

Code Review

This pull request refactors the event polling logic in main.rs by flattening nested if statements using the let_chains feature. Feedback indicates that let_chains is an unstable Rust feature that will cause compilation errors on the stable toolchain, so the code should be reverted to nested if let blocks. Additionally, the indentation and closing braces need to be adjusted to maintain compatibility and correct block structure.

[denversc]

/gemini review

[gemini-code-assist]

Code Review

This pull request refactors the event handling loop in rutt-tui/src/main.rs to use let expressions in logic chains for more concise code. However, the review feedback correctly identifies that this syntax relies on the let_chains feature, which is currently unstable in Rust. Unless the project is specifically targeting the nightly toolchain, this change will cause compilation errors on stable Rust, so it is recommended to revert to nested if let statements.