Create Codeship Build - GitHub Action

Simple action that creates an auth token and calls the Codeship API to create a build for a specific project.

Required ENV variables:

• CODESHIP_USERNAME
• CODESHIP_PASSWORD
• CODESHIP_ORG_UUID
• CODESHIP_PROJECT_UUID
• CODESHIP_API_URL (optional)
• CODESHIP_PROJECT_REF (optional, defaults to master)