parameterize generate-dev

[lucix-aws]

see source comment

[Madrigal]

Love the idea (I'm running into this right now), ideally there would be a way to do this to also just generate the service you're interested in, since that's what takes the most time.

My workflow right now is something like

// make changes to smithy-go
cd ../smithy-go && make && cd ../aws-sdk-go-v2 && SMITHY_GO_BUILD_API=com.amazonaws.s3#AmazonS3 make smithy-build && gofmt -w -s service/s3

and then manually check changes

[lucix-aws]

Not so coincidentally I have almost the exact same thing but with aliases

smg && smgb && go2 && SMITHY_GO_BUILD_API=com.amazonaws.sqs SMITHY_GO_EXPERIMENTAL_SERDE=com.amazonaws.sqs make generate-dev && cd service/sqs && go build ./...