[Feature]: Add a mechanism for users to check and build platform config files

[jamesmengo]

What area(s) will this request affect?

Other

What type of change do you want to see?

New feature

Overview

Create a new set of commands that can be used to build and validate platform-owned configuration files such as

• .env, shopify.app.toml, .shopifyignore

Ideas / Example Commands

• Create Create a file with a placeholder / template
• Build Provide a mechanism launches an interactive flow that allows you to build a .env (or at least provides some info)
• Check Domain specific, but for an example of .shopifyignore this could be fed a list of inputs which are matched against the patterns

Motivation

Config files are often a set it and forget it kind of thing, so we can forget how painful it can be to get these right.

On top of that, being able to validate your .shopifyignore directly against a theme could save valuable feedback cycles

I have a prototype of something along these lines which allows users to validate .shopifyignore

• Add 'shopify theme check-pattern' command to the CLI #3781