Better documentation/process around initial setup/deployment

[kristianfreeman]

Initial setup of OMW is very developer-oriented: you need to run through the Workers quick start, be able to create KV namespaces locally, edit your wrangler.toml, etc – instead of needing to do all this, it would be neat to be able to do everything from the UI or with GitHub Actions + the CF dashboard and not need to do any sort of local terminal development