Frozen(hidden) rows/cols, data validation, hyperlinks

[Izobov]

No description provided.

[Copilot]

Pull Request Overview

This PR adds several new features to the XLSX export functionality including frozen rows/columns, hidden rows/columns, data validation, and hyperlinks support. The changes enhance the library's ability to create more feature-rich Excel files.

Key changes:

• Added support for frozen panes in worksheets with configurable frozen rows and columns
• Implemented hidden row and column functionality
• Added data validation with range references and string lists
• Introduced hyperlink support with external URL references

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
src/lib.rs	Core implementation of frozen panes, hidden rows/cols, data validation, hyperlinks, and related XML generation
package.json	Added development script for easier testing workflow
example/worker.html	Updated to use local worker path for development
example/datasets.js	Comprehensive test data demonstrating all new features with realistic examples

Comments suppressed due to low confidence (1)

src/lib.rs:653

• Inconsistent indentation - this line has extra leading spaces compared to surrounding code.

                       let value = format!("\"{}\"", v.source.value);