fix: mode of files reset to 644 when they are formatted

Author: djcsdy

src/modified-file.ts

@@ -160,7 +160,7 @@ export class ModifiedFile<TFormatterConfig> {
                     "--add",
                     "--replace",
                     "--cacheinfo",
-                    `100644,${hash},${this.pathInGit}`
+                    `${mode},${hash},${this.pathInGit}`
                 ],
                 {cwd: this.gitDirectoryParent}
             );