Add notebook for Rubik Model conversion

[samfreund]

Description

Adds a notebook that can be run on Google Colab for converting a PyTorch model to tflite for Rubik Pi.

closes #1951
closes #1953
closes #1435

Meta

Merge checklist:

• Pull Request title is short, imperative summary of proposed changes
• The description documents the what and why
• If this PR changes behavior or adds a feature, user documentation is updated
• If this PR touches photon-serde, all messages have been regenerated and hashes have not changed unexpectedly
• If this PR touches configuration, this is backwards compatible with settings back to v2024.3.1
• If this PR touches pipeline settings or anything related to data exchange, the frontend typing is updated
• If this PR addresses a bug, a regression test for it is added

[samfreund]

Documentation will be added in #2005

[boomermath]

After trying it out here's what I think:

• It seems to work without the Numpy Fix, although later it does prompt a session restart. You could possibly consider removing numpy pip install cell, and then just inform users to restart when prompted.
• It took me a second to figure out for a Y/n prompt how to click on the box in the cell output and answer Y, maybe some instructions/notice abt that possibly?
• It would be nice to have an overview of how the process works, for people who may be new to this, maybe don't need to walk thru Qualcomm signup, but maybe explain providing custom quantization samples for the tflite model (for better quantized performance, as I've seen, it seems to use COCO for quantization right now), and the jobs that the script creates on your qualcomm acct. Would be helpful to know so that people don't get confused by the job links/ONNX model that it creates, and wait til the end for the tflite model.

[samfreund]

@boomermath if u could give this a final once-over, I think it's good to go

[boomermath]

lgtm