refactor: remove empty services (#116)

* remove empty services

* remove old factory

* remove old static files

* cleanup more duplicate service code

* file/folder reorg

backend/internal/data/repo/repo_group_test.go

@@ -0,0 +1,33 @@
+package repo
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_Group_Create(t *testing.T) {
+	g, err := tRepos.Groups.GroupCreate(context.Background(), "test")
+
+	assert.NoError(t, err)
+	assert.Equal(t, "test", g.Name)
+
+	// Get by ID
+	foundGroup, err := tRepos.Groups.GroupByID(context.Background(), g.ID)
+	assert.NoError(t, err)
+	assert.Equal(t, g.ID, foundGroup.ID)
+}
+
+func Test_Group_Update(t *testing.T) {
+	g, err := tRepos.Groups.GroupCreate(context.Background(), "test")
+	assert.NoError(t, err)
+
+	g, err = tRepos.Groups.GroupUpdate(context.Background(), g.ID, GroupUpdate{
+		Name:     "test2",
+		Currency: "eur",
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, "test2", g.Name)
+	assert.Equal(t, "EUR", g.Currency)
+}