fix(compat): resolve cyclic import between compat.ts and index.ts (#99)

Import SUPPORTED_SERVER_VERSION directly from version.ts instead of
index.ts, which itself imports from client.ts, creating a cycle.
version.ts is the canonical source for this constant.

Closes #67

Co-authored-by: Claude <noreply@anthropic.com>

Author: zeevdr

src/compat.ts

@@ -5,7 +5,7 @@
  */
 
 import { IncompatibleServerError } from "./errors.js";
-import { SUPPORTED_SERVER_VERSION } from "./index.js";
+import { SUPPORTED_SERVER_VERSION } from "./version.js";
 
 /**
  * Parse a semver-like version string into an array of numbers.