Add a crude solve result output to cmd_explain

Author: jrray

crates/spk-cli/cmd-explain/src/cmd_explain.rs

@@ -5,7 +5,7 @@
 use clap::Args;
 use miette::Result;
 use spk_cli_common::{flags, CommandArgs, Run};
-use spk_solve::AbstractSolver;
+use spk_solve::{AbstractSolver, Package};
 
 /// Show the resolve process for a set of packages.
 #[derive(Args)]
@@ -90,7 +90,10 @@ impl Run for Explain {
             formatter.run_and_print_resolve(&solver).await?;
         } else {
             // TODO: print the solve
-            solver.solve().await?;
+            let solution = solver.solve().await?;
+            for item in solution.items() {
+                println!("{}", item.spec.ident());
+            }
         }
 
         Ok(0)