Completely rework mojang textures queue implementation, split it across separate data providers

tests/mojang_textures_queue_mock.go

@@ -1,33 +0,0 @@
-package tests
-
-import (
-	"github.com/elyby/chrly/api/mojang"
-
-	"github.com/stretchr/testify/mock"
-)
-
-type MojangTexturesQueueMock struct {
-	mock.Mock
-}
-
-func (m *MojangTexturesQueueMock) GetTexturesForUsername(username string) chan *mojang.SignedTexturesResponse {
-	args := m.Called(username)
-	result := make(chan *mojang.SignedTexturesResponse)
-	arg := args.Get(0)
-	switch arg.(type) {
-	case *mojang.SignedTexturesResponse:
-		go func() {
-			result <- arg.(*mojang.SignedTexturesResponse)
-		}()
-	case chan *mojang.SignedTexturesResponse:
-		return arg.(chan *mojang.SignedTexturesResponse)
-	case nil:
-		go func() {
-			result <- nil
-		}()
-	default:
-		panic("unsupported return value")
-	}
-
-	return result
-}