Feature/v2/watermark (#4215)

Add watermark feature

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

frontend/src/constants/addWatermarkConstants.ts

@@ -0,0 +1,28 @@
+import { AddWatermarkParameters } from "../hooks/tools/addWatermark/useAddWatermarkParameters";
+
+export interface AlphabetOption {
+  value: string;
+  label: string;
+}
+
+export const alphabetOptions: AlphabetOption[] = [
+  { value: "roman", label: "Roman" },
+  { value: "arabic", label: "العربية" },
+  { value: "japanese", label: "日本語" },
+  { value: "korean", label: "한국어" },
+  { value: "chinese", label: "简体中文" },
+  { value: "thai", label: "ไทย" },
+];
+
+export const defaultWatermarkParameters: AddWatermarkParameters = {
+  watermarkType: undefined,
+  watermarkText: '',
+  fontSize: 12,
+  rotation: 0,
+  opacity: 50,
+  widthSpacer: 50,
+  heightSpacer: 50,
+  alphabet: 'roman',
+  customColor: '#d3d3d3',
+  convertPDFToImage: false
+};