We don't reset font family on any level, so there is no need to
bubble the setting using a preprocessor and render the inline styles
explicitly in every block.
In this commit, I change how font-family settings are distributed/rendered
in the email renderer. In the new approach, we rely on class names defining font-family
and a generated CSS sheet with font-family definitions.
We apply the font-family CSS by inlining CSS rules for families in the later phase of
rendering after all individual blocks are processed.
[MAILPOET-5740]
I envision the StylesController as the source of information about
styles settings in both the editor and renderer.
We will add email styles settings and these will be accessed in PHP via this service.
[MAILPOET-5540]
In this commit, I copied the code for processing the rendering of emails
from the current renderer.
This will allow us to use different base templates and styles.
Ideally, we should be able to add hooks and reuse the renderer from the engine namespace in
the current renderer.
[MAILPOET-5540]
