Moving Vice to gomod and general housecleaning

[ojizero]

• Moved package to use Go Mods.
• Moved CI to GitHub Actions.
• Updated UUID package to use gofrs/uuid in place of satori/go.uuid as the later isn't maintained. This only affects NATS tests which are still passing.
• Run tests in a matrix against support Go versions (1.18 and 1.17).
• Added tools package to track static analysis tools following Go's guidelines on this.
• Replaced megacheck (deprecated now) with staticcheck.
• Moved NATS dependencies to their new paths.

All previous tests are passing meaning that (in theory at least) those changes are stable and non-breaking, however this should be tagged at V2 since moving to gomod itself could be breaking for old users.