allow custom framework use args in refactor templates

[DustarMao]

now custom framework cannot use args in refactor templates.

with refactor template i18n.t('$1') in i18n-ally-custom-framework.yml,
when we extract text like `hello, ${'world'}`,
we will only get i18n.t("<keypath of 'hello, {0}'>"),
but we need i18n.t("<keypath of 'hello, {0}'>", ['world']),
here is no way to do this now.

but with this patch, and config below, it will works as we need

# i18n-ally-custom-framework.yml
refactorTemplates:
  - i18n.t('$1', $2)
  - i18n.t('$1')

notice: the first template with $2 only used with args not empty, so we need a template without $2 for fallback