fix(cortex-cli): show YAML error instead of TOML error for skill parsing

Fixes bounty issue #1593

When parsing skill files with unknown extensions, the debug skill command
would try YAML first, then TOML. If both failed, it incorrectly showed
the TOML error message instead of the YAML error. Now preserves the YAML
error since YAML is the primary format attempted first.

Author: factorydroid

cortex-cli/src/debug_cmd.rs

@@ -925,7 +925,9 @@ async fn run_skill(args: SkillArgs) -> Result<()> {
                         // Try YAML first, then TOML
                         serde_yaml::from_str(&content)
                             .map_err(|e| e.to_string())
-                            .or_else(|_| toml::from_str(&content).map_err(|e| e.to_string()))
+                            .or_else(|yaml_err| {
+                                toml::from_str(&content).map_err(|_| yaml_err) // Preserve YAML error since YAML is tried first
+                            })
                     }
                 };