clarify errors

src/vcs.rs

@@ -103,7 +103,11 @@ impl Vcs {
                 format!("{}", self.work_dir.display()).italic(),
             );
         } else {
-            println!("{}", "Mismatching projects and profiles".with(ERROR_COLOR));
+            if self.profiles.is_empty() {
+                println!("{}", "No profiles defined, use 'cargo vcs save' to generate one".with(ERROR_COLOR));
+            } else {
+                println!("{}", "Mismatching projects and profiles".with(ERROR_COLOR));
+            }
             self.list();
         }
 
@@ -318,7 +322,7 @@ impl Vcs {
             } else {
                 path = path
                     .parent()
-                    .ok_or_else(|| Error::input_error("Workspace not found", path_str))?;
+                    .ok_or_else(|| Error::input_error("No workspace found", path_str))?;
             }
         }
     }