fix: Add Stream Wrappers for use with various environments

[RohinBhargava]

What's included:

• Adds three new StreamWrapper implementations which injects the correct deps depending on environment:

1. Node 18+ StreamWrapper that exposes methods for both fs.Writable and WritableStream
2. Undici StreamWrapper that exposes methods for browser and cloudflare environments
3. Node 16-17 StreamWrapper that exposes methods for fs.Writable
4. Cloudflare CI Script that checks cloudflare can import SeedApiClient and instantiate it.
5. Browser CI Script that checks browser can import SeedApiClient and instantiate it.

I know we discussed removing 16-17, but this would lead to a bigger change.

Testing on all environments using ElevenLabs and Vellum, will include source code for the tests

Notes:

More on CI tests, if there are bad imports, the CI checks expect to fail, when inspecting the stdout logs, e.g. for cloudflare:

FER-2497

[dsinghvi]

looks great