Install script should create `./bin/dev`

[jasonfb]

• [ ] For parity with JSBundling, the installer script should create a simple shell script at ./bin/dev with this contents:

#!/usr/bin/env bash
if ! command -v foreman &> /dev/null
then
  echo "Installing foreman…"
  gem install foreman
fi
foreman start -f Procfile.dev-static

• [ ] remember shell script must be set to be executable (chmod 0755 ./bin/dev)

• [ ] use the post-install message to direct people to this option

TODO: @jasonfb says he will PR this.

[jasonfb]

the only purpose of this is to standardize the development process across different paradigms (Importmap, JSBundling, Webpacker, Shakapacker, etc) so that new devs don't have to learn a different way to boot their Rails app for each new app they work on. (I realize that the exception is still default Rails installation with Importmaps which has no ./bin/dev tool)

[justin808]

@jasonfb I like the idea. Can you throw in a PR?

[ahangarha]

@jasonfb I like the idea. Can you throw in a PR?

Keep me as backup

[justin808]

@ahangarha you can do this if you like. It's simple enough.