* Add example gallery

* Add example gallery

* Update rtd environment

* Fix typo in `generate_gallery.py`

* Add graph rewriting tutorial to examples

* Add default gallery image

* Fix default image path

* Add default image

* Add scan tutorial example

* Add header links to github/colab/binder

Add ablog with tags, authors, and categories

Modify example notebooks

* Update license and package name in footer

Delete placeholder notebook

* Delete docs for `sandbox` module

* rename `pytensor.tensor.var._tensor_py_operators` -> `pytensor.tensor.variable._tensor_py_operators`

* Fix underline lengths

* Remove reference to depreciated functions

* Add end of file newline

* Remove references to sandbox

* Try adding sitemap and robots.txt

* pre-commit

* Add cross-references and fix formatting

* Fix cross-reference