doc: Copilot new features update

[MarcinVaadin]

Update including new features of Copilot

[github-actions]

AI Language Review

The following issues require improvement in the document:

1. Built-In Panels Section:

   • The description for the "Backend & Data" panel should use the Oxford comma for consistency. It currently reads, "Access to H2 console and project dependencies helper."

2. Selected Component Toolbar Section:

   • Ensure consistent use of articles before nouns for clarity. Currently, the list is inconsistent: "setting alignment, adjusting padding, changing a gap or accessing properties." Each item should have "a" for parallel structure, i.e., "setting alignment, adjusting padding, changing a gap, or accessing properties."

These adjustments will ensure clarity and consistency throughout the document.