🎨 Palette: Add Clear Search button to empty state

[AhmmedSamier]

💡 What: Added a 'Clear Search' button directly to the empty state view when no results are found.
🎯 Why: Reduces interaction friction by providing an immediate, actionable recovery path instead of forcing users to manually clear the search box or toggle filters.
♿ Accessibility: Included proper AutomationProperties.Name and ToolTip for screen readers.

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PR created automatically by Jules for task 10838841715909954847 started by @AhmmedSamier

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: b2ee3eb4-8939-4f27-b5d4-726f660d2714

📥 Commits

Reviewing files that changed from the base of the PR and between 38ca4e9 and 8650f1d.

📒 Files selected for processing (2)

• .jules/palette.md
• visual-studio-extension/DeepLensVisualStudio/DeepLensVisualStudio/ToolWindows/SearchControl.xaml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch palette-empty-state-clear-10838841715909954847

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