Add jupter lexical commands

[goanpeca]

Needed for datalayer/vscode-datalayer#31

Ref image

[Copilot]

Pull Request Overview

Adds new Lexical commands to control Jupyter cells from the editor: run the current cell, run all cells, restart the kernel, and clear all outputs. Registers handlers for each command within the JupyterInputOutputPlugin.

• Adds four new commands: RUN_JUPYTER_CELL_COMMAND, RUN_ALL_JUPYTER_CELLS_COMMAND, RESTART_JUPYTER_KERNEL_COMMAND, CLEAR_ALL_OUTPUTS_COMMAND
• Implements command handlers to execute the focused cell, execute all cells, restart the kernel, and clear outputs
• Logs status and error information during command execution

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[echarles]

LGTM Thx @goanpeca