Implement rendering modes parameters

[Martoon-00]

For instance, when rendering a floating-point number, it is desired to specify the precision manually.

For instance, we can allow writing it like

myText = [int||My value is #f[3]{ value }|]

To avoid breaking changes (and also for the user's simplicity) we can require something different than rmode'xxx :: RMode, e.g. have a special mode with parameters:

newtype ParamRMode (ps :: [Type]) (a :: Type) = ParamRMode
  { renderWithModeAndParams :: HLint ps -> a -> Builder
  }

parametrized :: RMode a -> ParamRMode ps a

And maybe we should also allow for named parameters? But not in this iteration I guess.