* Update custom-node-list.json Add Free computing tool
Add FreeComputingTool,Some mathematical calculation nodes, string calculation nodes, can customize the number of parameters and calculation formulas. The calculation content can also be displayed in places such as the label title of Comfy Node
* change desc
* Update custom-node-list.json
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Co-authored-by: Dr.Lt.Data <128333288+ltdrdata@users.noreply.github.com>