[Font Palettes] Add support for font size boost value in fonts logic

[vladolaru]

We want to be able to define both at master font control level (e.g., for sm_font_primary) and at font interval level, a font size boost coefficient.

This will be a float value that will get multiplied with the font size value in the font palettes calculations. Most of the time this value will be between zero and two (e.g., 0.8, 1.2, 1.5). The default value will be 1, meaning no effect.

We will use the font_size_boost key in the fonts logic configuration.

[vladolaru]

There you go @georgeolaru

[georgeolaru]

Nice work @vladolaru! I just tested and this fonts stuff's really getting there 🤩

As we discussed, are you willing to change the name to font_size_multiplier? In the meantime, I will adjust the "Pandora" (0.8) and "Edward" (1.2) palette to take into account this functionality.

[vladolaru]

As discussed, we will use font_size_multiplier.

[vladolaru]

Done @georgeolaru

[georgeolaru]

Awesome! I changed through the Cloud font palettes and we can close this 👏