feat(create-jsx-email): setup npx command

[lordelogos]

Component / Package Name:

create-jsx-email

This PR contains:

• [ ] bugfix
• [x] feature
• [ ] refactor
• [x] documentation
• [ ] other

Are tests included?

• [ ] yes (bugfixes and features will not be merged without tests)
• [x] no

Breaking Changes?

• [ ] yes (breaking changes will not be merged unless absolutely necessary)
• [x] no

If yes, please include "BREAKING CHANGES:" in the first commit message body, followed by a description of what is breaking.

List any relevant issue numbers:

Description

This PR sets up the create-jsx-email command. The fastest way to setup a jsx-email project

Usage

npx create-jsx-email
# OR
npx create-jsx-email <project-name>

[lordelogos]

LGTM🚀