feat: add example using `rich` and `pixi-build-python` and remove flask #93

Job	Run time
determine changes	6s
pre-commit	41s
Cargo Machete	1m 31s
cargo fmt \| ubuntu	13s
cargo clippy \| ubuntu	46s
build binary \| linux x86_64	2m 18s
build binary \| macos aarch64	2m 43s
cargo test \| ubuntu	4m 13s
cargo test \| macos aarch64	5m 22s
cargo test \| macos x86_64	0s
cargo test \| windows	5m 27s
cargo rustdoc \| ubuntu	1m 3s
build binary \| windows aarch64	3m 51s
build binary \| macos x86_64	0s
build binary \| windows x86_64	3m 21s
pytest integration \| linux x86_64	59s
test wheel installation \| linux x86_64 / Test Installation of Common Wheels \| linux-x86_64	1m 56s
pytest integration \| macos aarch64	2m 37s
test wheel installation \| macos aarch64 / Test Installation of Common Wheels \| macos-aarch64	2m 5s
pytest integration \| windows x86_64	5m 8s
test wheel installation \| windows x86_64 / Test Installation of Common Wheels \| windows-x86_64	2m 42s
	47m 2s

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