refactor: remove generated/index.ts

The generated/ directory now contains only:
- sdk.types.ts - Pre-processed types
- sdk.schemas.ts - Generated Zod schemas
- sdk.schemas.zod.test.ts - Integration tests

types.ts will be the public API, re-exporting from these files.

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

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

Author: ochafik

package.json

@@ -51,10 +51,6 @@
             "import": "./dist/esm/experimental/tasks/index.js",
             "require": "./dist/cjs/experimental/tasks/index.js"
         },
-        "./generated": {
-            "import": "./dist/esm/generated/index.js",
-            "require": "./dist/cjs/generated/index.js"
-        },
         "./*": {
             "import": "./dist/esm/*",
             "require": "./dist/cjs/*"