Rename Aesara→pytensor

[michaelosthege]

This PR renames the project as decided internally.

Rename related changes

• Aesara → Pytensor
• aesara → pytensor
• AESARA → PYTENSOR
• Applied pre-commit
• GitHub repository URL
• Contact email addresses → pymc.devs@gmail.com

Further changes

• Upgraded mypy and fixed a platform-specific mypy error

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[ricardoV94]

When should we change the aliases? import pytensor.tensor as pt

[michaelosthege]

When should we change the aliases? import pytensor.tensor as pt

I would either not do it already (to keep pulling upstream easier) or do it in a follow-up PR.

Getting this rename merged early means that we can start splitting up tasks about Readme, Logo, CoC, deployment and other things

[twiecki]

@michaelosthege Do you have the code you used for this?

[michaelosthege]

Ctrl+Shift+H in VS Code, then search "Aesara" with case-sensitivity, replace by "PyTensor"...

I did this manually for the three bullet points in the description, then searched again for pytensor-devs and pytensor.devs to find the URLs and Email addresses and fixed those manually.

Oh and then I searched the file explorer in VS Code to find file names containing aesara. Of those there were a couple in c_code and a Jupyter notebook IIRC.