fix migrations (#414)

* refactor(config.ts): improve code readability by formatting array elements and conditions
* fix(migrations): handle undefined values correctly when setting default config values
* fix(migrations): ensure process exits with error code on migration failure
* fix(commit.ts): update error handling to provide clearer feedback when commit message generation fails
* feat(config.ts): add cleanUndefinedValues function to sanitize config values by converting 'undefined' and 'null' strings to actual values
* refactor(config.ts): return cleaned config from getConfig function to ensure consistent data types
* chore(migrations): log entriesToSet in migration to assist with debugging and tracking changes

src/migrations/_run.ts

@@ -53,6 +53,7 @@ export const runMigrations = async () => {
             migration.name
           }: ${error}`
         );
+        process.exit(1);
       }
 
       isMigrated = true;