fix(migrate): correctly inform about prettierignore (#1160)

Oxfmt does support `.prettierignore` 


https://oxc.rs/docs/guide/usage/formatter/ignore-files.html#prettierignore

Author: TheAlexLichter

packages/cli/src/migration/migrator.ts

@@ -539,7 +539,7 @@ export async function migratePrettierToOxfmt(
   const prettierIgnorePath = path.join(projectPath, '.prettierignore');
   if (fs.existsSync(prettierIgnorePath)) {
     warnMigration(
-      `${displayRelative(prettierIgnorePath)} found — Oxfmt uses .oxfmtignore. Please migrate manually.`,
+      `${displayRelative(prettierIgnorePath)} found — Oxfmt supports .prettierignore, but using the \`ignorePatterns\` option is recommended.`,
       options?.report,
     );
   }

rfcs/migration-command.md

@@ -570,7 +570,7 @@ When a Prettier configuration file (`.prettierrc*`, `prettier.config.*`, or `"pr
 4. Remove `prettier` and `prettier-plugin-*` from `devDependencies`/`dependencies`
 5. Rewrite `prettier` scripts in `package.json` to `vp fmt`, stripping Prettier-only flags
 6. Rewrite `prettier` references in lint-staged configs
-7. Warn about `.prettierignore` if present (Oxfmt uses `.oxfmtignore`)
+7. Warn about `.prettierignore` if present (Oxfmt supports it, but `ignorePatterns` is recommended)
 8. The existing migration flow picks up `.oxfmtrc.json` and merges it into `vite.config.ts`
 
 **Script Rewriting** (powered by [brush-parser](https://github.com/reubeno/brush) for shell AST parsing):