Add process events and event store

Created new files for process events handling and event storage. The process events include timestamp and stream id and an interface for handling them. In addition, a new interface for event storage has been introduced.

internal/events/proces_events.go

@@ -0,0 +1,27 @@
+package events
+
+import (
+	"github.com/PiotrFerenc/mash2/internal/types"
+	"github.com/google/uuid"
+	"time"
+)
+
+type Event struct {
+	CreatedAt time.Time
+	StreamId  uuid.UUID
+}
+
+type ProcessEvent interface {
+	ProcessEvent() *Event
+}
+
+type ProcessCreated struct {
+	Process types.Process
+}
+
+func (p ProcessCreated) ProcessEvent() *Event {
+	return &Event{
+		CreatedAt: time.Now(),
+		StreamId:  p.Process.Id,
+	}
+}

internal/repositories/event-store.go

@@ -0,0 +1,7 @@
+package repositories
+
+import "github.com/PiotrFerenc/mash2/internal/events"
+
+type EventStore interface {
+	AddEvent(event events.Event) error
+}