Add builder for standalone python for comfy

[telamonian]

Adds a command comfy-cli standalone that will:

1. grab an appropriate standalone python interpreter from https://github.com/indygreg/python-build-standalone
2. determine requirements by analyzing an existing comfyui install and then recompile the requirements W.R.T. the version/platform/whatever of the standalone python interpreter
3. fetch all comfyui requirements for the standalone python interpreter by doing one of
   3a. install all requirements to the standalone's internal site-packages directory
   3b. precache the package artifacts of all requirements
   3c. fetch (if exists) or build the wheels of all requirements
4. create a .tgz tarball containing the standalone interpreter and the requirements

Code exists to run all of 3a-c, though currently the standalone command itself only supports 3b.

[socket-security]

New dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
pypi/uv@0.3.2	environment, filesystem, network, shell, unsafe	0	36.8 MB	astral-bot, crmarsh, zanie

View full report↗︎

[telamonian]

This PR is now out of draft status, is more-or-less feature complete, and is ready for testing. Especially if you have a windows machine, please checkout this PR branch and try out the new standalone command.

There is still a ton of cleanup to do, and any suggestions are welcome