Add MIT license

[lymanepp]

Add MIT license

Checklist:

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Description of Changes

Add MIT license

Reason for Change

Add license to address https://github.com/tonesto7/echo-speaks/issues/1122

How Has This Been Tested?

N/A

Screenshots (if appropriate):