Github workflow for end-to-end integration testing

[nickgarfield]

One really convenient Github workflow would be:

• Spin up localnet
• Initialize programs
• cronos stress -c 1 -p 0 -r 2

Then, confirm the task executes all 3 times within a reasonable timeout period.

This would represent the most basic of e2e testing systems.

Future versions should additionally validate dynamic actions work as intended.