Add eslint-plugin-relay rules (warning only)

Signed-off-by: Émile Ré <emile@getprobo.com>

packages/eslint-config/src/index.ts

@@ -2,6 +2,7 @@ import { baseConfigs } from "#baseConfigs";
 import { importsConfigs } from "#importsConfigs";
 import { browserLanguageOptionsConfigs, nodeLanguageOptionsConfigs } from "#languageOptionsConfigs";
 import { reactConfigs } from "#reactConfigs";
+import { relayConfigs } from "#relayConfigs";
 import { stylisticConfigs } from "#stylisticConfigs";
 import { tsConfigs } from "#tsConfigs";
 
@@ -10,6 +11,7 @@ export const configs = {
   imports: importsConfigs,
   ts: tsConfigs,
   react: reactConfigs,
+  relay: relayConfigs,
   stylistic: stylisticConfigs,
   languageOptions: {
     browser: browserLanguageOptionsConfigs,

packages/eslint-config/src/relayConfigs.ts

@@ -0,0 +1,11 @@
+import relay from "eslint-plugin-relay";
+import type { FlatConfig } from "typescript-eslint";
+
+export const relayConfigs: FlatConfig.ConfigArray = [
+  {
+    plugins: {
+      relay: relay,
+    },
+    ...relay.configs["ts-recommended"],
+  },
+];