feat : add section fastSell and add section nowSell and add particle bg

src/types/props.d.ts

@@ -11,7 +11,7 @@ export interface AlertProps {
 export interface ButtonProps {
   children: React.ReactNode;
   onClick?: () => void;
-  extra?: React.CSSProperties;
+  extra?: string;
 }
 
 // begin Route
@@ -63,3 +63,9 @@ export type LearnProps = {
   activeTutorial: number;
   tutorialList: TutorialList;
 };
+
+// begin TypeWriter.tsx
+interface TypewriterProps {
+  text: string;
+  speed?: number; // سرعت تایپ در میلی‌ثانیه
+}