Initial spike

This is mostly to solidify the overall structure with the agent,
plugins, and testing philosphy.

plugins/mock_Plugin.go

@@ -0,0 +1,18 @@
+package plugins
+
+import "github.com/stretchr/testify/mock"
+
+import "github.com/vektra/cypress"
+
+type MockPlugin struct {
+	mock.Mock
+}
+
+func (m *MockPlugin) Read() ([]*cypress.Message, error) {
+	ret := m.Called()
+
+	r0 := ret.Get(0).([]*cypress.Message)
+	r1 := ret.Error(1)
+
+	return r0, r1
+}