feat: add example using `rich` and `pixi-build-python` and remove flask #95

Job	Run time
pre-commit	47s
Cargo Machete	1m 1s
determine changes	8s
cargo rustdoc \| ubuntu	1m 4s
cargo fmt \| ubuntu	14s
cargo test \| windows	5m 6s
cargo test \| macos aarch64	6m 4s
build binary \| linux x86_64	2m 13s
cargo test \| ubuntu	4m 9s
cargo clippy \| ubuntu	50s
build binary \| macos aarch64	3m 16s
build binary \| windows x86_64	3m 43s
cargo test \| macos x86_64	0s
build binary \| macos x86_64	0s
build binary \| windows aarch64	4m 8s
pytest integration \| linux x86_64	55s
test wheel installation \| linux x86_64 / Test Installation of Common Wheels \| linux-x86_64	1m 51s
pytest integration \| macos aarch64	2m 33s
test wheel installation \| macos aarch64 / Test Installation of Common Wheels \| macos-aarch64	1m 46s
pytest integration \| windows x86_64	1m 29s
test wheel installation \| windows x86_64 / Test Installation of Common Wheels \| windows-x86_64	1m 35s
	42m 52s

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