Add automated testing on Github

[han-so1omon]

What needs to be done

Add automated testing with Github Actions

Why it needs to be done

We are finding too many day-zero bugs, and the current test suite is not running

Acceptance Criteria

• Migrate the CPS java contracts to this repository - Migrate CPS contracts #101
• Establish frontend tests - Frontend tests #100
• Run unit tests on pull request to master - Unit tests #99
• Run integration/regression tests with local testnet on pull request to master - Integration/regression tests #102
• Establish release versions for contracts - Contract release versions #103
• Establish release versions for the frontend - Frontend release versions #104
• Run end-to-end tests with Lisbon or Berlin testnet on new release version - End-to-end tests #105