Add Crop to V2 (#4471)

# Description of Changes
Add Crop to V2

---------

Co-authored-by: EthanHealy01 <[email protected]>
Co-authored-by: Connor Yoh <[email protected]>
Co-authored-by: ConnorYoh <[email protected]>

frontend/src/constants/cropConstants.ts

@@ -0,0 +1,12 @@
+import { PAGE_SIZES } from "./pageSizeConstants";
+
+// Default crop area (covers entire page)
+export const DEFAULT_CROP_AREA = {
+  x: 0,
+  y: 0,
+  width: PAGE_SIZES.A4.width,
+  height: PAGE_SIZES.A4.height,
+} as const;
+
+
+export type ResizeHandle = 'nw' | 'ne' | 'sw' | 'se' | 'n' | 'e' | 's' | 'w' | null;

frontend/src/constants/pageSizeConstants.ts

@@ -0,0 +1,8 @@
+// Default PDF page sizes in points (1 point = 1/72 inch)
+export const PAGE_SIZES = {
+  A4: { width: 595, height: 842 },
+  LETTER: { width: 612, height: 792 },
+  A3: { width: 842, height: 1191 },
+  A5: { width: 420, height: 595 },
+  LEGAL: { width: 612, height: 1008 },
+} as const;