Add rustqlite example

[bsodmike]

This also incorporates corrections in #47

[carllerche]

Hey, thanks for the PR. The examples all use sqlite now. If it is about persisting the DB to a file, maybe that can be added as a CLI option to the existing example?

[bsodmike]

Hey, thanks for the PR. The examples all use sqlite now. If it is about persisting the DB to a file, maybe that can be added as a CLI option to the existing example?

Good idea, let's do that :)

[bsodmike]

@carllerche I opted for grabbing the CLI arg directly instead of using Clap etc. Cheers!

[Shourya742]

Any specific reason for not using clap? few minor nits and can we squash commits, as context for both revolves around same file. Rest look ok.

[Shourya742]

Suggested change

	let flag = "--persist-to-file";
	let driver = if args.len() > 1 && args[1] == flag {
	// Persist to local file
	let filename = "toasty.db3";
	let file_path = format!("./{}", filename);
	let file = PathBuf::from(file_path.as_str());
	Sqlite::open(file).unwrap()
	} else {
	// Use the in-memory sqlite driver
	Sqlite::in_memory()
	};
	const PERSIST_FLAG: &str = "--persist-to-file";
	const DB_FILENAME: &str = "toasty.db3";
	let driver = if args.get(1).map_or(false, |arg| arg == PERSIST_FLAG) {
	let file_path = PathBuf::from(DB_FILENAME);
	Sqlite::open(file_path).expect("Failed to open SQLite file")
	} else {
	Sqlite::in_memory()
	};