refactor(v2): init eventstore package (#7806)

* refactor(v2): init database package

* refactor(v2): init eventstore package

* add mock package

* test query constructors

* option based push analog to query

internal/v2/eventstore/postgres/intent.go

@@ -0,0 +1,42 @@
+package postgres
+
+import (
+	"github.com/zitadel/logging"
+
+	"github.com/zitadel/zitadel/internal/v2/eventstore"
+)
+
+type intent struct {
+	*eventstore.PushAggregate
+
+	sequence uint32
+}
+
+func makeIntents(pushIntent *eventstore.PushIntent) []*intent {
+	res := make([]*intent, len(pushIntent.Aggregates()))
+
+	for i, aggregate := range pushIntent.Aggregates() {
+		res[i] = &intent{PushAggregate: aggregate}
+	}
+
+	return res
+}
+
+func intentByAggregate(intents []*intent, aggregate *eventstore.Aggregate) *intent {
+	for _, intent := range intents {
+		if intent.PushAggregate.Aggregate().Equals(aggregate) {
+			return intent
+		}
+	}
+	logging.WithFields("instance", aggregate.Instance, "owner", aggregate.Owner, "type", aggregate.Type, "id", aggregate.ID).Panic("no intent found")
+	return nil
+}
+
+func checkSequences(intents []*intent) bool {
+	for _, intent := range intents {
+		if !eventstore.CheckSequence(intent.sequence, intent.PushAggregate.CurrentSequence()) {
+			return false
+		}
+	}
+	return true
+}