refactor: add .gitignore and use ucp-sdk python packages

[angryfoxx]

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[0x8000-0000]

I am sorry, I was wrong to dismiss this change; I happened to test this code on another machine, and it failed with Python 3.14; Python 3.13 is required for some of the dependencies. Please add this back and then I will approve this change. But please note that we'll approve pull request #1 which has some substantial overlap with these changes so you'll have to rebase before final approval and merge.