Redesign: new editorial design language, drop tailwind for UnoCSS #18

Job	Run time
Line endings (LF only)	13s
leptosfmt --check	9s
wasm-pack test (headless Firefox)	1m 56s
cargo clippy	1m 20s
build	1m 39s
cargo fmt --check	11s
cargo test	28s
	5m 56s

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