Run Mode Improvements

Quokka Pro now streamlines exploratory workflows with a persistent Run on Demand mode, a one-key rerun command, and indicators that retain previous logs.

• The Run Once command has been renamed to Run on Demand and no longer terminates the session when you edit content. Re-execution happens when you explicitly trigger it, keeping state/context alive and giving precise control for exploratory workflows.
• The Quokka.js: Re-execute command (F5 in VS Code, Shift+F5 in IntelliJ while running) instantly runs your file on demand. This is useful for Run on Demand and Run on Save modes to force immediate execution, and for time-based code or externally sourced data (disk/network) that changes outside the editor.
• For VS Code, indicators for Run on Demand and Run on Save now retain logs from the previous run so you can inspect prior output before triggering another execution, aiding comparison and incremental debugging.