Is `scripts/dev.js` necessary?

[cjcenizal]

https://github.com/vectara/create-ui/pull/4 introduced this script, which enables local development by copying files from the appropriate app template into a temporary dev/ directory, installing dependencies, and running the app locally.

Ironically, this PR also refactors the app template folder structure, which makes this script moot because a maintainer can just cd into the app template directory, install dependencies, and run the app locally for the same effect.

However, this depends on having a .env file in the app template directory, which configures the app. @mrderyk How will your changes affect this process? Will it still be possible to just run an app locally from within its source directory? If so then maybe we can do away with scripts/dev.js.

[cjcenizal]

After discussion, we decided that we can remove dev.js and replace it with:

• Updating .gitignore to ignore configuration.ts files in the templates. This will enable us to develop locally by creating our own versions of these files.
• Updating the dev:qa etc. scripts with commands such as cd ./apps/qa && npm install && npm run start.

[mrderyk]

PR is here: https://github.com/vectara/create-ui/pull/15