Support none escaped \

[zenoplex]

Hi, thanks for the great tool.

I have a issue with below where translate key containing unescaped backslash (ie. \n) can cause typed file to be broken on build.

"translation": {
      "\n": "line break",

IMHO, key with backslash is a little awkward, but since i18n supports this without escaping, it would be nice if typed_i18n also supports its feature.