docs: docs update

Author: hejsztynx

docs/docs/misc/compatibility.mdx

@@ -86,3 +86,7 @@ Sanitization **is** enforced on the web, as injecting unsafe HTML directly into
 
 On Web those methods are no-ops. These include: `measure`,
 `measureInWindow`, `measureLayout` and `setNativeProps`.
+
+## Swift Package Manager
+
+SPM is supported, but it's still experimental. It's not recommended for production use yet, and its behavior may change in future releases, including breaking changes.