feat: add state sync

src/sync/client.luau

@@ -0,0 +1,31 @@
+local atom = require(script.Parent.Parent.atom)
+type Atom<T> = atom.Atom<T>
+local patch = require(script.Parent.patch)
+local types = require(script.Parent.types)
+
+type ClientSyncOptions = {
+	atoms: { [string]: Atom<any> },
+}
+
+type ClientSync = {
+	sync: (self: ClientSync, payload: types.SyncPayload) -> (),
+}
+
+local function client(options: ClientSyncOptions): ClientSync
+	local atoms = options.atoms
+	local self = {} :: ClientSync
+
+	function self:sync(payload)
+		for key, state in payload.data do
+			if payload.type == "patch" then
+				atoms[key]:set(patch.apply(atoms[key]:get(), state))
+			else
+				atoms[key]:set(state)
+			end
+		end
+	end
+
+	return self
+end
+
+return client