### Changes:
- Introduced `global.d.ts` to define global type declarations for the `globalThis` interface.
- Added `__ENV__` object with the following properties:
- `isBrowser: boolean`
- `isNode: string | false`
- `isServerless: boolean`
- Included an export statement to ensure the file is treated as a module.
### Purpose:
Defined global environment properties to standardize and enhance environment detection across browser, Node.js, and serverless environments. This improves type safety and consistency in the codebase.
