Floating mode forcommand palette dock

### Description of the new feature / enhancement

The dock could have a feature to be detached from the edges of the screen and to round the edges so it looks like an actual dock

### Scenario when this would be used?

This would be used to customise it to how the user wants

### Supporting information

_No response_

The issue names no files, tests, or entry points. Start by locating the command palette dock implementation and reviewing how its current edge attachment and styling work; clarify the supported detached positioning, rounded appearance, and completion criteria before making changes.

Written by the indexing model from the issue text.