[Peek] Fix horizontal and vertical scrolling when text wrapping is disabled

[Copilot]

Issue

When disabling text wrapping in Peek and viewing a file that exceeds the width of the window, a horizontal scrollbar appears. When users try to scroll horizontally with a trackpad, vertical scrolling stops working - the only way to continue scrolling vertically is to manually drag the vertical scrollbar.

Solution

The issue was resolved by modifying the Monaco editor scrollbar configuration in index.html:

1. Added scrollPredominantAxis: false to allow simultaneous scrolling on both horizontal and vertical axes
2. Added mouseWheelScrollSensitivity: 1 to ensure standard scrolling sensitivity is maintained

These minimal changes ensure that users can properly navigate content both horizontally and vertically when text wrapping is disabled, without disrupting any other functionality.

Testing

Verified that:

• Both horizontal and vertical scrolling work simultaneously with text wrapping disabled
• The fix doesn't affect any other Monaco editor functionality
• The original text wrapping toggle feature continues to work correctly

Fixes #4.

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