Summary

Improve file explorer iconography to use smarter, folder-name-aware icons similar to VS Code conventions.

Context

Requested as a readability/scannability upgrade for project navigation.

Chat refs:

• 1469824092155805730
• 1469856960676630745

Expected Behavior

Common folder/file types should show recognizable semantic icons (for example: docs/tools/config/etc.) to improve quick visual parsing.

Current Behavior

Icons are perceived as too generic and less informative than expected.

Acceptance Criteria

• Introduce improved default icon mapping for common folder/file categories.
• Keep fallback icon behavior for unknown names/types.
• Ensure icons remain legible in both light/dark themes (if applicable).

cc @jeffscottward