chore(deps): add renovate config (#8)

Author: binoy14

.github/renovate.json

@@ -0,0 +1,42 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "local>sanity-io/renovate-config",
+    ":dependencyDashboardApproval"
+  ],
+  "ignorePresets": ["github>sanity-io/renovate-config:group-non-major"],
+  "hostRules": [
+    {
+      "matchHost": "registry.npmjs.org",
+      "token": "{{ secrets.SANITY_NPM_TOKEN }}"
+    }
+  ],
+  "packageRules": [
+    {
+      "matchDepTypes": ["devDependencies"],
+      "matchUpdateTypes": ["patch", "minor"],
+      "groupName": "devDependencies (non-major)"
+    },
+    {
+      "description": "Group TypeScript related deps in a single PR, as they often have to update together",
+      "groupName": "typescript-tooling",
+      "matchPackageNames": ["@sanity/pkg-utils", "@sanity/tsdoc", "typescript"]
+    },
+    {
+      "description": "Group sdk related deps in a single PR, as they often have to update together",
+      "groupName": "storybook-tooling",
+      "matchPackageNames": ["@sanity/sdk", "@sanity/sdk-*"]
+    },
+    {
+      "description": "Group eslint related deps in a single PR, as they often have to update together",
+      "groupName": "eslint-tooling",
+      "matchPackageNames": [
+        "@eslint/*",
+        "eslint",
+        "eslint-plugin-*",
+        "eslint-config-*",
+        "typescript-eslint"
+      ]
+    }
+  ]
+}