refactor clap into a separate file

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/clap.rs

@@ -0,0 +1,15 @@
+//! Integration with `clap`
+
+use clap::Parser;
+
+/// Commandline arguments
+#[derive(Parser, Debug)]
+#[clap(version, about, long_about = None)]
+pub struct Args {
+	#[arg(short, long)]
+	/// Optional argument to the path of a conduwuit config TOML file
+	pub config: Option<String>,
+}
+
+/// Parse commandline arguments into structured data
+pub fn parse() -> Args { Args::parse() }