feat(grpc): Add basic grpc example

src/main.rs

@@ -1,8 +1,10 @@
 use std::{env, path::PathBuf};
 
 use clap::Parser;
+use std::error::Error;
 
 mod file_explorer;
+mod grpc;
 
 #[derive(Parser)]
 #[command(version, about, long_about = None)]
@@ -11,7 +13,8 @@ struct Args {
     path: Option<PathBuf>,
 }
 
-fn main() {
+#[tokio::main()]
+async fn main() -> Result<(), Box<dyn Error>> {
     let cli = Args::parse();
     let path = cli
         .path
@@ -19,5 +22,11 @@ fn main() {
 
     let files = file_explorer::walk_dir(&path).expect("error");
 
-    eprintln!("DEBUGPRINT[4]: main.rs:20: files={:#?}", files);
+    eprintln!("DEBUGPRINT[4]: main.rs:20: files={:#?}", files.len());
+
+    let server = grpc::run()?;
+
+    server.connect().await?;
+
+    Ok(())
 }