Enhance blur and increase logi width

[vjaykrsna]

This pull request updates the custom blur effect for the VS Code command palette to be more efficient, robust, and compatible with future updates. The changes improve both the JavaScript logic for applying/removing the blur effect and the CSS for the blur overlay.

Enhancements to the command palette blur effect:

• Refactored vscode-script.js to use MutationObservers for detecting when the command palette is shown or hidden, improving performance and reliability over the previous polling approach. The script now efficiently applies and removes the blur effect and manages sticky widget visibility.
• Added comments and modularized the JavaScript for clarity and maintainability, with separated functions for showing/hiding the blur and handling keyboard events.

Visual improvements:

• Increased the blur overlay width in custom-vscode.css from 60% to 90% for better coverage when the command palette is open.

⚠ Width can be subjective maybe we can do 75-80 if you want