docs: Add PowerSync to list of projects using Melos (#746)

Author: mugikhan

docs/index.mdx

@@ -65,6 +65,7 @@ The following projects are using Melos:
 - [canonical/ubuntu-desktop-provision](https://github.com/canonical/ubuntu-desktop-provision)
 - [ubuntu/app-center](https://github.com/ubuntu/app-center)
 - [leonardocustodio/polkadart](https://github.com/leonardocustodio/polkadart)
+- [powersync/powersync.dart](https://github.com/powersync-ja/powersync.dart)
 
 <Info>
 

packages/melos/README.md

@@ -155,6 +155,7 @@ The following projects are using Melos:
 - [canonical/ubuntu-desktop-provision](https://github.com/canonical/ubuntu-desktop-provision)
 - [ubuntu/app-center](https://github.com/ubuntu/app-center)
 - [jhomlala/alice](https://github.com/jhomlala/alice)
+- [powersync/powersync.dart](https://github.com/powersync-ja/powersync.dart)
 
 > Submit a PR if you'd like to add your project to the list. Update the
 > [README.md](https://github.com/invertase/melos/edit/main/packages/melos/README.md)