Add changeset

Author: jerelmiller

.changeset/big-scissors-hope.md

@@ -0,0 +1,32 @@
+---
+"@apollo/client-graphql-codegen": minor
+---
+
+Introduce a new GraphQL Codegen plugin to generate the input object configuration needed to configure custom scalars for each field.
+
+```ts
+// codegen.ts
+import type { CustomScalarsPluginConfig } from "@apollo/client-graphql-codegen/custom-scalars";
+
+const config: CodegenConfig = {
+  // ...
+  generates: {
+    "./path/to/custom-scalars.ts": {
+      plugins: ["@apollo/client-graphql-codegen/custom-scalars"],
+      config: {
+        // ...
+      } satisfies CustomScalarsPluginConfig,
+    },
+  },
+};
+```
+
+This will generate an `inputObjects` object in the generated file that can be used to configure the `inputObjects` option for `InMemoryCache`.
+
+```ts
+import { inputObjects } from "./path/to/custom-scalars";
+
+const cache = new InMemoryCache({
+  inputObjects,
+});
+```