Add fixes to reciprocal allocation, example cli, add move money

src/main.rs

@@ -1,3 +1,54 @@
-fn main() {
-    println!("Hello, world!");
+use std::path::PathBuf;
+
+use clap::{Parser, Subcommand};
+
+#[derive(Parser)]
+#[clap(name = "coster-rs")]
+#[clap(author = "Pivato M. <mpivato4@gmail.com>")]
+#[clap(version = "0.0.1")]
+#[clap(about = "Simple, fast, efficient costing tool", long_about = None)]
+struct Cli {
+    #[clap(subcommand)]
+    command: Commands,
 }
+
+#[derive(Subcommand)]
+enum Commands {
+    move_money {
+        #[clap(short = 'r', long, parse(from_os_str), value_name = "FILE")]
+        rules: PathBuf,
+
+        #[clap(short, long, parse(from_os_str), value_name = "FILE")]
+        output: Option<PathBuf>,
+    },
+    allocate_overheads {
+        #[clap(short, long, parse(from_os_str), value_name = "FILE")]
+        rules: PathBuf,
+
+        #[clap(short, long, parse(from_os_str), value_name = "FILE")]
+        lines: PathBuf,
+
+        #[clap(short, long, parse(from_os_str), value_name = "FILE")]
+        output: Option<PathBuf>,
+    },
+}
+
+// TODO: Return error (implement the required trait to allow an error to be returned)
+fn main() {
+    let cli = Cli::parse();
+
+    match cli.command {
+        Commands::move_money { rules, output } => move_money(),
+        Commands::allocate_overheads {
+            rules,
+            lines,
+            output,
+        } => allocate_overheads(),
+    }
+}
+
+fn move_money() {
+    // read rules, for each rule, inspect the files and
+}
+
+fn allocate_overheads() {}