docs: add migration guides

Author: Rel1cx

apps/website/content/docs/meta.json

@@ -2,7 +2,8 @@
   "title": "Documentation",
   "pages": [
     "getting-started",
-    "migration",
+    "!migrating",
+    "migrating-from-eslint-plugin-react",
     "---Core Reference---",
     "rules",
     "presets",

apps/website/content/docs/migration.mdx renamed to apps/website/content/docs/migrating-from-eslint-plugin-react.mdx

@@ -0,0 +1,12 @@
+---
+title: Migrating to v2
+description: A guide to help you migrate your project to v2 of our plugins.
+---
+
+## Overview
+
+{/* TODO: Add a brief overview of the changes in v2 and why users should migrate. */}
+
+## Steps to upgrade
+
+{/* TODO: Provide a step-by-step guide for users to follow when migrating their projects to v2. Include code snippets, configuration changes, and any other relevant information. */}