feat: Get and Set lines

[sunamo]

No description provided.

[Copilot]

Pull Request Overview

This PR adds methods to get and set multi-line text data from the clipboard by providing convenient array-based APIs. The implementation treats clipboard text as lines that can be split and joined using standard line terminators.

• Adds GetLines() and GetLinesAsync() methods that retrieve clipboard text and split it into string arrays
• Adds SetLines() and SetLinesAsync() methods that join string arrays and set them as clipboard text
• Uses standard line separators (\r\n, \r, \n) for splitting and Environment.NewLine for joining

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[Copilot]

The method should validate that the lines parameter is not null to prevent a NullReferenceException when calling string.Join().

Suggested change

	{
	{
	if (lines == null)
	throw new ArgumentNullException(nameof(lines));

[Copilot]

The method should validate that the lines parameter is not null to prevent a NullReferenceException when calling string.Join().

Suggested change

	{
	{
	if (lines == null)
	throw new ArgumentNullException(nameof(lines));