modified: internal/handlers/oauth.go new file: internal/handlers/oauth_VK.go new file: internal/handlers/oauth_yandex.go modified: internal/utils/oauth_utils.go add oauth for VK and ynadex and google
modified: go.sum new file: internal/config/oauth.go new file: internal/handler/auth.go new file: internal/utils/errors.go new file: internal/utils/json.go modified: internal/utils/password.go Add utils, add auth handler, auth configs