Add `FromStr` for `DynamicColor` and static colors #396

Job	Run time
cargo clippy (wasm32)	23s
formatting	26s
cargo clippy (windows-latest)	46s
cargo test (windows-latest)	33s
cargo clippy (macos-latest)	25s
cargo test (macos-latest)	22s
cargo clippy (ubuntu-latest)	30s
cargo test (ubuntu-latest)	14s
cargo check (msrv) (wasm32)	19s
cargo check (msrv) (windows-latest)	40s
cargo doc	13s
cargo miri	1m 26s
cargo check (msrv) (macos-latest)	21s
cargo test (wasm32)	14s
cargo check (msrv) (ubuntu-latest)	22s
typos	3s
	7m 17s

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