feat: add lyric font settings

[mikelxk]

P.S: in the now playing window, click on singer and album doesn't seem to work.

[listen1]

P.S: in the now playing window, click on singer and album doesn't seem to work.

fixed it! thanks.

[listen1]

I think we'd better change font size/weight text input to select option, it's easy for users.

PS: If there's a preview under that would be nicer, user can preview lyric font size/weight in real time. You can refer qq music settings of lyric.

[mikelxk]

I changed font weight to select, however I don't think change the font size to select is a good option:
There's no conventional name mapping for font size and I want user to choose from any accurate value of font size they want not just " small" " medium" "large" "x-large", also I will be really redundant if I create a dropdown on different pixel value.
Anyway, I think user a least have better knowledge on font size compared to font weight.