feat: export types from main entry point (#520)

Author: lumirlumir

src/index.js

@@ -135,3 +135,4 @@ recommendedPlugins.markdown = processorPlugins.markdown = plugin;
 
 export default plugin;
 export { MarkdownSourceCode };
+export * from "./types.js";

src/types.js

@@ -0,0 +1,10 @@
+/**
+ * @fileoverview Dummy file to enable exporting types from the main module.
+ * @author 루밀LuMir(lumirlumir)
+ */
+
+//-----------------------------------------------------------------------------
+// Exports
+//-----------------------------------------------------------------------------
+
+export default {};

tests/types/types.test.ts

@@ -1,15 +1,16 @@
-import markdown, { MarkdownSourceCode } from "@eslint/markdown";
-import type { SourceLocation, SourceRange } from "@eslint/core";
+import markdown from "@eslint/markdown";
 import type {
 	MarkdownRuleDefinition,
 	MarkdownRuleVisitor,
+	MarkdownSourceCode,
 	Toml,
 	Json,
 	RangeMap,
 	Block,
-} from "@eslint/markdown/types";
-import { ESLint, Linter } from "eslint";
-import { Position } from "unist";
+} from "@eslint/markdown";
+import type { SourceLocation, SourceRange } from "@eslint/core";
+import type { ESLint, Linter } from "eslint";
+import type { Position } from "unist";
 import type {
 	// Nodes (abstract)
 	Node,