Add error kinds for configuration errors

libimagstorestdhook/src/vcs/git/error.rs

@@ -1,5 +1,7 @@
 generate_error_module!(
     generate_error_types!(GitHookError, GitHookErrorKind,
+        ConfigError => "Configuration Error",
+        ConfigTypeError => "Configuration value type wrong",
         MkRepo => "Repository creation error"
     );
 );