[FEATURE] Add page link ViewHelper

This ViewHelper is an alternative to <f:page.link /> that fetches the linked page title and inserts it as link text as proposed in #240.
[TASK] Respect hideNotTranslated setting
[TASK] Add titleFields argument
[DOC] Correct return value description
[TASK] Make use of registerArguments to improve legibility
[TASK] Use proper string concatenation to reduce line lengths
[TASK] Adhere coding guidelines
Merge pull request #242 from bjo3rnf/autolink

[FEATURE] Add page link ViewHelper