Make line height configurable

[pro-sumer]

Text is sometimes hard to read because lines are so close to each other.

Please make the line height configurable in settings to improve readability.

(I'd like to set it to 150%)

[shuuji3]

The line height section from the above website says:

But, generally speaking, between 115% and 150% is where the optimum value sits (often expressed as 1.15 to 1.5 in word processing software settings) for type set in a Latin script. Languages that use plentiful diacritics will usually need more generous leading.

https://fonts.google.com/knowledge/using_type/choosing_a_suitable_line_height#setting-line-height

Probably we can add a new setting option to select at least three options: 1.15, 1.33... (current value), and 1.5 so that user can select a suitable space for their environment and condition.