Added docs about webpack config

[urgent]

This commit provides a webpack config for a bundle similiar to browserify.

Browserify bundles to an empty function for fs, and for each module declares fs as a graceful-fs require.

https://benclinkinbeard.com/posts/how-browserify-works/

The webpack bundle built from this commit's config resolves graceful-fs as an alias to fs.

fs used in dat-sdk/index for browser/hyperdrive IO:

https://github.com/random-access-storage/random-access-web

[RangerMauve]

Thank you for the PR! Added some questions about the config. Also, mind if I add this to the docs for the SDK on our docs website? https://github.com/datproject/docs/pull/170

[urgent]

You're welcome.

Not at all! Glad I could contribute.

[RangerMauve]

Sweet. Thank you! 😁