refactor(v2): init events (#7823)

creates events structures for initial projections and read models

internal/v2/org/state.go

@@ -0,0 +1,36 @@
+package org
+
+type State uint8
+
+const (
+	UndefinedState State = iota
+	ActiveState
+	InactiveState
+	RemovedState
+	maxState
+)
+
+func (s State) IsValid() bool {
+	return s != UndefinedState ||
+		s < maxState
+}
+
+func (s State) Is(state State) bool {
+	return s == state
+}
+
+func (s State) IsValidState(state State) bool {
+	return s.IsValid() && s.Is(state)
+}
+
+func (s State) IsValidStates(states ...State) bool {
+	if !s.IsValid() {
+		return false
+	}
+	for _, state := range states {
+		if s.Is(state) {
+			return true
+		}
+	}
+	return false
+}