cli: Print error chain sources

Currently only the top level error is printed which makes it hard to
pinpoint the origin of the error, this patch prints the error chain
similar to a backtrace.

Signed-off-by: Pragyan Poudyal <[email protected]>

Author: Johan-Liebert1

cli/src/main.rs

@@ -37,6 +37,11 @@ fn main() {
     // This code just captures any errors.
     if let Err(e) = run() {
         tracing::error!("{:#}", e);
+        e.chain().skip(1).enumerate().for_each(|(idx, error)| {
+            if let Some(e) = error.source() {
+                eprintln!("{idx}: {e:#?}",)
+            }
+        });
         std::process::exit(1);
     }
 }