Restructure and start working on CLI

src/main.rs

@@ -0,0 +1,52 @@
+use anyhow::Result;
+use clap::{Parser, Subcommand};
+use libjrpc::{targets::rust::RustCompiler, FileProcessor};
+
+#[derive(Parser)]
+struct Cli {
+    #[command(subcommand)]
+    command: Commands,
+    #[arg(short, long, global = true)]
+    verbose: bool,
+}
+
+#[derive(Subcommand)]
+enum Commands {
+    Compile {
+        input: String,
+        output: String,
+        #[arg(short, long)]
+        definition: Option<String>,
+    },
+    Targets,
+}
+
+pub fn main() -> Result<()> {
+    let cli = Cli::parse();
+
+    if cli.verbose {
+        log::set_max_level(log::LevelFilter::Trace);
+    } else {
+        log::set_max_level(log::LevelFilter::Warn);
+    }
+
+    match cli.command {
+        Commands::Compile {
+            input,
+            output,
+            definition,
+        } => {
+            let mut fp = FileProcessor::new();
+            let ir = fp.start_compile(&input)?;
+
+            libjrpc::targets::compile::<RustCompiler>(ir, &output)?;
+
+            //TODO: Implement definition output!
+        }
+        Commands::Targets => {
+            panic!("Not yet implemented!")
+        }
+    }
+
+    Ok(())
+}