D403: Require capitalizing single word sentence #26678

Job	Run time
cargo fmt	18s
mkdocs	3m 44s
pre-commit	32s
Determine changes	8s
python package	1m 25s
cargo fuzz	4m 55s
cargo test (linux)	3m 18s
cargo clippy	1m 47s
benchmarks	6m 36s
cargo test (wasm)	1m 21s
cargo test (windows)	8m 24s
cargo udeps	1m 59s
formatter instabilities and black similarity	0s
test scripts	52s
test ruff-lsp	13s
ecosystem	8m 47s
	44m 19s

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