Feat: better cell-tools

[ChengJiale150]

See in #127 .

What's Changed

add Cell and Notebook Model

same as #133

union list_cells and read_cells to read_notebook

• add param response_format to control the output (brief for list_cells, detailed for read_cells)
• add notebook_name to read all connected notebook without activate it.
• add start_index and limit to control the token return by this tool when reading large notebook (>100 cells)
• change the tests to adapt above feature.

insert_cell

• use same format API to format output in insert_cell to reduce inconsistence.

overwrite_cell_source

• better description

execute_cell

• better code origization and description
• set default timeout to 90s

insert_execute_code_cell

• remove tools/insert_execute_code_cell.py and combine it with insert_cell and execute_cell

read_cell

• union the output format as list to adapt standard MCP MutiModel ouput format.
• add include_outputs param to control whether to return output.

delete_cell

• return output add the cell source of deleted cell to avoid delete cell incorrectly and help LLMs to recover.
• add description to tell LLMs to delete many cells in descending order of their index to avoid index shifting.

[ChengJiale150]

merge the latest code, and move all same _get_jupyter_ydoc in each tools to utils.py.

[ChengJiale150]

@echarles All changes in #127 are applied, next I will devote to update docs.

[eleonorecharles]

Thanks @ChengJiale150 !