chore(lit-client): add changeset for getIpfsId method for CIDv0 hash computation

Author: Ansonhkg

.changeset/solid-heads-repeat.md

@@ -0,0 +1,10 @@
+---
+'@lit-protocol/lit-client': minor
+---
+
+LitClient now offers `getIpfsId` via `@lit-protocol/lit-client/ipfs`, letting apps compute CIDv0 hashes (e.g., `await getIpfsId('hello')`) while keeping bundles lean.
+
+```ts
+import { getIpfsId } from '@lit-protocol/lit-client/ipfs';
+const cid = await getIpfsId('hello');
+```