feat: add "Add Page Labels" tool to the application

- Introduced a new tool for adding page labels to PDF documents, allowing users to apply Roman numerals, prefixes, and custom numbering ranges.
- Created a new HTML page for the tool with a user-friendly interface for file upload and label rule configuration.
- Implemented logic for handling file uploads, processing PDF files, and applying page labels based on user-defined rules.
- Added necessary types and utility functions for managing page label styles and normalization of start values.
- Updated main application configuration to include the new tool in the navigation.
- Added tests for page label utilities to ensure correct functionality.

src/js/types/add-page-labels-type.ts

@@ -0,0 +1,22 @@
+export type PageLabelStyleName =
+  | 'DecimalArabic'
+  | 'LowercaseRoman'
+  | 'UppercaseRoman'
+  | 'LowercaseLetters'
+  | 'UppercaseLetters'
+  | 'NoLabelPrefixOnly';
+
+export interface LabelRule {
+  id: string;
+  pageRange: string;
+  style: PageLabelStyleName;
+  prefix: string;
+  startValue: number;
+  progress: boolean;
+}
+
+export interface AddPageLabelsState {
+  file: File | null;
+  pageCount: number;
+  rules: LabelRule[];
+}

src/js/types/index.ts

@@ -51,3 +51,4 @@ export * from './scanner-effect-type.ts';
 export * from './adjust-colors-type.ts';
 export * from './bates-numbering-type.ts';
 export * from './page-preview-type.ts';
+export * from './add-page-labels-type.ts';