fix: zod external (#1950)

* chore: add zod to external dependencies in CLI and spec configurations

* chore: include zod as an external dependency in compiler and sdk configurations

* chore: add zod to external dependencies for compiler, spec, and sdk

Author: cherkanovart

.changeset/lazy-feet-ask.md

@@ -0,0 +1,8 @@
+---
+"@lingo.dev/_compiler": minor
+"@lingo.dev/_spec": minor
+"lingo.dev": minor
+"@lingo.dev/_sdk": minor
+---
+
+add zod to external depth