Linting for proper opening quotes

[bountonw]

This applies to all translation .md files regardless of language, while source files continue to be ignored.

• Opening smart single and double quotes should have a space before them if they are not the first thing on the line. /[^ ][‘“]/ should fail. I would use \s but I don't know how it is handled at the beginning of the line. Perhaps there is a better regex.
• Opening smart single and double quotes should not be followed by whitespace. /[‘“]\s/ should fail.