Add changeset entry

Author: simolus3

.changeset/strange-items-fly.md

@@ -0,0 +1,10 @@
+---
+'@powersync/react-native': minor
+'@powersync/common': minor
+'@powersync/web': minor
+'@powersync/diagnostics-app': patch
+'@powersync/node': patch
+'@powersync/nuxt': patch
+---
+
+Remove support for the JavaScript sync client. The default Rust client is the only option starting from this version.