Feat: Add custom scroll amount (#966)

* Added slower scroll amount mousewheel like feel

* Added custom scroll amount slider

* Made changes as requested

src/modules/reader/constants/ReaderSettings.constants.tsx

@@ -40,6 +40,7 @@ import { WebtoonPageIcon } from '@/assets/icons/svg/WebtoonPageIcon.tsx';
  * percentage values
  */
 export enum ReaderScrollAmount {
+    TINY = 10,
     SMALL = 25,
     MEDIUM = 75,
     LARGE = 95,
@@ -308,6 +309,12 @@ export const AUTO_SCROLL_SPEED = {
     step: 0.5,
 };
 
+export const SCROLL_AMOUNT = {
+    min: 5,
+    max: 100,
+    step: 5,
+};
+
 export const READER_BLEND_MODE_VALUE_TO_DISPLAY_DATA = {
     [ReaderBlendMode.DEFAULT]: {
         title: 'reader.settings.custom_filter.rgba.blend_mode.default',