chore: add changeset

Author: Amine

.changeset/angry-planes-accept.md

@@ -0,0 +1,9 @@
+---
+'@powersync/react-native': minor
+'@powersync/common': minor
+'@powersync/node': minor
+'@powersync/web': minor
+'@powersync/attachments': patch
+---
+
+Deprecated @powersync/attachments in favor of enhanced and consistent attachment functionality built into @powersync/common and platform-specific SDKs