internal/model: Add Action, Step types and related methods

This change adds the Steps object to replace the stateswitch.Transition*
types. It also adds struct tags for all the fields so they can be
serialized to be stored in the KV.

Moves DeviceQueryor interface into its own package for easier import
without conflicts.

internal/device/interface.go

@@ -0,0 +1,45 @@
+package device
+
+import (
+	"context"
+	"os"
+
+	"github.com/bmc-toolbox/common"
+
+	bconsts "github.com/bmc-toolbox/bmclib/v2/constants"
+)
+
+//go:generate mockgen -source model.go -destination=../fixtures/mock.go -package=fixtures
+
+// Queryor interface defines methods to query a device.
+//
+// This is common interface to the ironlib and bmclib libraries.
+type Queryor interface {
+	// Open opens the connection to the device.
+	Open(ctx context.Context) error
+
+	// Close closes the connection to the device.
+	Close(ctx context.Context) error
+
+	PowerStatus(ctx context.Context) (status string, err error)
+
+	SetPowerState(ctx context.Context, state string) error
+
+	ResetBMC(ctx context.Context) error
+
+	// Reinitializes the underlying device queryor client to purge old session information.
+	ReinitializeClient(ctx context.Context)
+
+	// Inventory returns the device inventory
+	Inventory(ctx context.Context) (*common.Device, error)
+
+	FirmwareInstallSteps(ctx context.Context, component string) ([]bconsts.FirmwareInstallStep, error)
+
+	FirmwareUpload(ctx context.Context, component string, reader *os.File) (uploadVerifyTaskID string, err error)
+
+	FirmwareTaskStatus(ctx context.Context, kind bconsts.FirmwareInstallStep, component, taskID, installVersion string) (state bconsts.TaskState, status string, err error)
+
+	FirmwareInstallUploaded(ctx context.Context, component, uploadVerifyTaskID string) (installTaskID string, err error)
+
+	FirmwareInstallUploadAndInitiate(ctx context.Context, component string, file *os.File) (taskID string, err error)
+}