Restore missing type exports for mcpb package

- Export McpbManifestAny and Logger types from types.js
- Export McpbSignatureInfo and McpbUserConfigValues from shared/common.ts
- Add exports to both main and browser entry points
- Bump version to 2.0.1

This eliminates the need for manual type inference in consuming code.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/index.ts

@@ -6,5 +6,7 @@ export * from "./node/files.js";
 export * from "./node/sign.js";
 export * from "./node/validate.js";
 export * from "./schemas/index.js";
+export * from "./shared/common.js";
 export * from "./shared/config.js";
 export * from "./shared/constants.js";
+export * from "./types.js";