fix(SetupFont): correct line height increase handler

- Fixed copy-paste error in SetupFontMenu.svelte line 43
- Changed onIncrease from fontSizeStore.increase to lineHeightStore.increase
- Line height control now correctly modifies line height instead of font size

Closes #?

src/features/SetupFont/model/const/const.ts

@@ -0,0 +1,14 @@
+export const DEFAULT_FONT_SIZE = 16;
+export const MIN_FONT_SIZE = 8;
+export const MAX_FONT_SIZE = 100;
+export const FONT_SIZE_STEP = 1;
+
+export const DEFAULT_FONT_WEIGHT = 400;
+export const MIN_FONT_WEIGHT = 100;
+export const MAX_FONT_WEIGHT = 900;
+export const FONT_WEIGHT_STEP = 100;
+
+export const DEFAULT_LINE_HEIGHT = 1.5;
+export const MIN_LINE_HEIGHT = 1;
+export const MAX_LINE_HEIGHT = 2;
+export const LINE_HEIGHT_STEP = 0.1;