Add TestController (#50)

This can be used in tests to get access to a controller that behaves
just like a dev controller but doesn't require the normal Command bits
(UI, etc).

This can be enhanced over time as needed; for now it's pretty simple but
it's good enough to be used for API tests. A simple project create/read
API test is added as well, which serves to show the programmatic model
(as well as test those functions at the API level).

internal/servers/controller/testing_test.go

@@ -0,0 +1,13 @@
+package controller
+
+import (
+	"testing"
+)
+
+func Test_TestController(t *testing.T) {
+	t.Run("startup and shutdown", func(t *testing.T) {
+		t.Parallel()
+		tc := NewTestController(t, nil)
+		defer tc.Shutdown()
+	})
+}