[prettier-plugin-sql] export supported sql dialect names about prettier HOT 6 CLOSED

diff --git a/packages/sql/src/index.ts b/packages/sql/src/index.ts
index 81ceb70..84511b4 100644
--- a/packages/sql/src/index.ts
+++ b/packages/sql/src/index.ts
@@ -5,6 +5,7 @@ import type { AST, Option } from 'node-sql-parser'
 import nodeSqlParser from 'node-sql-parser'
 import type { Options, ParserOptions, Plugin } from 'prettier'
 import { format, type FormatOptions } from 'sql-formatter'
+import type { ReadonlyDeep } from 'type-fest'
 
 import { languages } from './languages.js'
 
@@ -32,7 +33,7 @@ export type SqlOptions = ParserOptions<AST> & SqlBaseOptions
 
 export type SqlFormatOptions = Options & SqlBaseOptions
 
-const SqlPlugin: Plugin<AST | string> = {
+export const ReadonlySqlPlugin = {
   languages,
   parsers: {
     sql: {
@@ -413,6 +414,6 @@ const SqlPlugin: Plugin<AST | string> = {
       ],
     },
   },
-}
+} as const satisfies ReadonlyDeep<Plugin<AST | string>>
 
-export default SqlPlugin
+export default ReadonlySqlPlugin as unknown as Plugin<AST | string>