Install watch fixes & install shopify theme dev pairing

[fleveillee]

@montalvomiguelo please test all functions (dev/build/install) and let me know if you find anything.

shopify theme component install shopify theme component install --watch

Components source is a local folder

• Watch is permitted
• .collections folder is not used anymore
• We are watching the source folder

Components source is a URL

• We are still using the '.components' folder
• Watch function should give an error, we do not support watching git repos

[montalvomiguelo]

shopify theme component install

1. when the collection is an ssth url, it throws the following
2. when the collection is an https url, it throws the following
3. when the collection is a relative path, it throws the following