Add webpack loading instructions

[stevenmccord]

Description

Add webpack loading instructions to the README.

#651

@json-schema-form/angular-schema-form-lead

[Anthropic]

Thank you very much @stevenmccord I appreciate this, just wanted to check if you have tried and know already if the alpha (develop) is any different or would the same instructions apply? I suspect they would.

[stevenmccord]

I have not tried the Alpha, but I know with the bootstrap split out it is different instructions. I imagine with the alpha I wouldn't need to utilize the import-loader as well so it should be simply import angular-schema-form and import angular-schema-form-bootstrap, but I can't say for sure yet, although I would like to give alpha a shot we are using the old version in production and can't quite move there yet. Thanks!