refactor: embrace scope cleanup, restructure code

packages/charm-sync/src/init.luau

@@ -1,21 +0,0 @@
-local client = require(script.client)
-local flatten = require(script.flatten)
-local patch = require(script.patch)
-local server = require(script.server)
-local types = require(script.types)
-local validate = require(script.validate)
-
-export type SyncPayload = types.SyncPayload
-
---[=[
-	Synchronizes state between the client and server. The server sends patches
-	to the client, which applies them to its local state.
-]=]
-return {
-	client = client,
-	server = server,
-	flatten = flatten,
-	validate = validate,
-	patch = patch,
-	isNone = patch.isNone,
-}