Org List and Get API Methods (#132)

* Create the organization Get handler.

* Added org listing.

* Make sure the cmp.Diff always sorts the returned organizations before comparing.

* Connect organization service to the Controller handler.

internal/servers/controller/handler.go

@@ -21,6 +21,7 @@ import (
 	"github.com/hashicorp/watchtower/internal/servers/controller/handlers/host_catalogs"
 	"github.com/hashicorp/watchtower/internal/servers/controller/handlers/host_sets"
 	"github.com/hashicorp/watchtower/internal/servers/controller/handlers/hosts"
+	"github.com/hashicorp/watchtower/internal/servers/controller/handlers/organizations"
 	"github.com/hashicorp/watchtower/internal/servers/controller/handlers/projects"
 	"github.com/hashicorp/watchtower/internal/servers/controller/handlers/users"
 )
@@ -79,6 +80,13 @@ func handleGrpcGateway(c *Controller) (http.Handler, error) {
 	if err := services.RegisterHostServiceHandlerServer(ctx, mux, &hosts.Service{}); err != nil {
 		return nil, fmt.Errorf("failed to register host service handler: %w", err)
 	}
+	os, err := organizations.NewService(c.IamRepoFn)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create organization handler service: %w", err)
+	}
+	if err := services.RegisterOrganizationServiceHandlerServer(ctx, mux, os); err != nil {
+		return nil, fmt.Errorf("failed to register organization service handler: %w", err)
+	}
 	ps, err := projects.NewService(c.IamRepoFn)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create project handler service: %w", err)