Use goakt testing framework

[jordan-rash]

Starts to test actors with embedded test harness

Depends on #477

[github-actions]

Merging this branch will increase overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/synadia-io/nex/api/nodecontrol/gen	0.00% (ø)
github.com/synadia-io/nex/node	9.28% (+0.10%)	👍
github.com/synadia-io/nex/node/internal/actors	19.03% (+6.17%)	👍
github.com/synadia-io/nex/node/internal/actors/pb	0.00% (ø)

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/synadia-io/nex/api/nodecontrol/gen/auction_response.go	0.00% (ø)	0	0	0
github.com/synadia-io/nex/node/internal/actors/agent_supervisor.go	43.75% (+43.75%)	32	14 (+14)	18 (-14)	🌟
github.com/synadia-io/nex/node/internal/actors/control_api_conversions.go	33.33% (+33.33%)	24	8 (+8)	16 (-8)	🌟
github.com/synadia-io/nex/node/internal/actors/pb/agents.pb.go	0.00% (ø)	0	0	0
github.com/synadia-io/nex/node/node.go	8.12% (+0.09%)	345 (-4)	28	317 (-4)	👍

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/synadia-io/nex/node/internal/actors/agent_supervisor_test.go
• github.com/synadia-io/nex/node/internal/actors/artifacts_test.go
• github.com/synadia-io/nex/node/internal/actors/control_api_test.go
• github.com/synadia-io/nex/node/internal/actors/mock_node_test.go

[bruth]

LGTM (tests pass after the update)