chore: enhance prettier-plugin-java package.json for module exports

- Add main and module fields to specify entry points for CommonJS and ESM.
- Update exports structure to support both import and require formats with correct type definitions.

Author: sunrabbit123

package.json

@@ -6,14 +6,18 @@
   "repository": "https://github.com/jhipster/prettier-java",
   "license": "Apache-2.0",
   "type": "module",
+  "main": "./dist/index.cjs",
+  "module": "./dist/index.mjs",
   "exports": {
-    "import": {
-      "types": "./dist/index.d.mts",
-      "default": "./dist/index.mjs"
-    },
-    "require": {
-      "types": "./dist/index.d.cjs",
-      "default": "./dist/index.cjs"
+    ".": {
+      "import": {
+        "types": "./dist/index.d.mts",
+        "default": "./dist/index.mjs"
+      },
+      "require": {
+        "types": "./dist/index.d.cts",
+        "default": "./dist/index.cjs"
+      }
     }
   },
   "files": [