Move cli.rs out of lib.rs

[kurotych]

Makes it possible to use sqlant as library without clap dependency

[Copilot]

Pull request overview

This PR successfully decouples the CLI functionality from the library code, allowing sqlant to be used as a library without requiring the clap dependency. The changes move the cli module from being public in lib.rs to being a private module in main.rs, and make clap an optional dependency controlled by a feature flag.

Key Changes:

• Moved CLI module from lib.rs to main.rs and made clap an optional dependency
• Configured Cargo to only build the binary when the "cli" feature is enabled
• Added CI test to verify library usage without clap dependency

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/main.rs	Declares cli module locally and updates function call from sqlant::cli::parse() to cli::parse()
src/lib.rs	Removes public cli module declaration, keeping only core library modules
Cargo.toml	Makes clap optional via "cli" feature, adds binary configuration with required features, includes "cli" in default features
.github/workflows/ci.yml	Adds comprehensive test job to verify library can be used without clap dependency

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

[nitpick] The imported get_generator function is not used in the test code. Consider removing it from the imports to keep the test minimal and clear.

Suggested change

	use sqlant::{GeneratorType, get_generator};
	use sqlant::GeneratorType;