Add ArraysAs, AsArrays, and corresponding traits for components and uints

[Ogeon]

This adds more casting traits, in addition to #338. These traits fulfill the same purpose as AsRef and AsMut, such as:

use palette::{Srgb, cast::ComponentsAsMut};

let mut image_buffer: Vec<u8> = /* ... */;
let color_buffer: &mut [Srgb<u8>] = image_buffer.components_as_mut();

[github-actions]

Benchmark for 4ff5c50

Click to view benchmark

Test	Base	PR	%
Cie family/lab to lch	3.3±0.00µs	3.3±0.01µs	0.00%
Cie family/lab to xyz	772.7±1.21ns	773.3±0.77ns	+0.08%
Cie family/lch to lab	1220.6±0.62ns	1208.7±0.75ns	-0.97%
Cie family/linsrgb to xyz	319.4±0.34ns	305.6±4.33ns	-4.32%
Cie family/linsrgb to xyz - wide::f32x8	251.3±0.48ns	251.4±0.29ns	+0.04%
Cie family/xyz to lab	8.6±0.01µs	8.6±0.02µs	0.00%
Cie family/xyz to yxy	673.2±0.38ns	681.0±0.50ns	+1.16%
Cie family/yxy to xyz	624.1±0.34ns	619.8±0.33ns	-0.69%
Matrix functions/matrix_inverse	13.9±0.01ns	14.3±0.01ns	+2.88%
Matrix functions/multiply_3x3	9.8±0.01ns	9.8±0.01ns	0.00%
Matrix functions/multiply_rgb_to_xyz	8.4±0.02ns	8.4±0.01ns	0.00%
Matrix functions/multiply_xyz	6.0±0.04ns	6.0±0.04ns	0.00%
Matrix functions/multiply_xyz_to_rgb	6.0±0.03ns	6.0±0.03ns	0.00%
Matrix functions/rgb_to_xyz_matrix	26.1±0.01ns	26.0±0.02ns	-0.38%
Rgb family/hsl to hsv	739.2±4.27ns	737.4±1.34ns	-0.24%
Rgb family/hsl to linear hsl	7.5±0.01µs	7.5±0.01µs	0.00%
Rgb family/hsl to rgb	2.4±0.00µs	2.4±0.00µs	0.00%
Rgb family/hsv to hsl	968.7±1.87ns	985.3±0.55ns	+1.71%
Rgb family/hsv to hwb	231.6±2.40ns	231.7±2.02ns	+0.04%
Rgb family/hsv to linear hsv	6.9±0.01µs	7.0±0.00µs	+1.45%
Rgb family/hsv to rgb	2.1±0.00µs	2.1±0.00µs	0.00%
Rgb family/hwb to hsv	556.7±1.12ns	557.6±0.40ns	+0.16%
Rgb family/hwb to linear hwb	8.3±0.01µs	8.1±0.01µs	-2.41%
Rgb family/linear hsl to hsl	7.5±0.01µs	7.5±0.01µs	0.00%
Rgb family/linear hsv to hsv	7.0±0.00µs	6.9±0.01µs	-1.43%
Rgb family/linear hwb to hwb	8.2±0.02µs	8.2±0.00µs	0.00%
Rgb family/linsrgb to rgb	3.7±0.00µs	3.7±0.00µs	0.00%
Rgb family/linsrgb to rgb - wide::f32x8	5.0±0.00µs	5.1±0.00µs	+2.00%
Rgb family/linsrgb_f32 to rgb_u8	1274.0±0.53ns	1274.1±0.66ns	+0.01%
Rgb family/linsrgb_f64 to rgb_u8	1365.1±3.57ns	1365.2±3.10ns	+0.01%
Rgb family/rgb to hsl	631.4±0.36ns	640.0±2.72ns	+1.36%
Rgb family/rgb to hsl - wide::f32x8	456.1±0.22ns	456.5±0.25ns	+0.09%
Rgb family/rgb to hsv	488.7±0.21ns	497.5±0.26ns	+1.80%
Rgb family/rgb to hsv - wide::f32x8	415.9±1.51ns	416.1±0.23ns	+0.05%
Rgb family/rgb to linsrgb	3.8±0.00µs	3.8±0.01µs	0.00%
Rgb family/rgb to linsrgb - wide::f32x8	3.1±0.00µs	3.1±0.00µs	0.00%
Rgb family/rgb_u8 to linsrgb_f32	303.4±1.09ns	303.4±1.10ns	0.00%
Rgb family/rgb_u8 to linsrgb_f64	309.5±1.41ns	310.6±1.43ns	+0.36%
Rgb family/xyz to linsrgb	362.0±0.20ns	352.3±0.58ns	-2.68%
Rgb family/xyz to linsrgb - wide::f32x8	248.7±0.24ns	248.9±1.70ns	+0.08%

[github-actions]

Benchmark for e823a25

Click to view benchmark

Test	Base	PR	%
Cie family/lab to lch	3.5±0.25µs	3.8±0.11µs	+8.57%
Cie family/lab to xyz	808.4±41.32ns	750.7±28.13ns	-7.14%
Cie family/lch to lab	1385.3±37.71ns	1335.3±90.23ns	-3.61%
Cie family/linsrgb to xyz	309.8±21.70ns	330.3±23.89ns	+6.62%
Cie family/linsrgb to xyz - wide::f32x8	275.0±13.78ns	245.3±11.80ns	-10.80%
Cie family/xyz to lab	9.7±1.28µs	9.5±0.38µs	-2.06%
Cie family/xyz to yxy	767.0±48.17ns	745.0±33.54ns	-2.87%
Cie family/yxy to xyz	639.5±45.29ns	612.1±26.88ns	-4.28%
Matrix functions/matrix_inverse	13.3±0.62ns	15.0±0.75ns	+12.78%
Matrix functions/multiply_3x3	9.5±0.47ns	10.4±0.70ns	+9.47%
Matrix functions/multiply_rgb_to_xyz	8.3±0.40ns	8.5±0.46ns	+2.41%
Matrix functions/multiply_xyz	6.0±0.38ns	6.4±0.36ns	+6.67%
Matrix functions/multiply_xyz_to_rgb	5.9±0.30ns	6.2±0.29ns	+5.08%
Matrix functions/rgb_to_xyz_matrix	26.8±1.73ns	27.6±1.38ns	+2.99%
Rgb family/hsl to hsv	796.5±35.23ns	816.3±37.85ns	+2.49%
Rgb family/hsl to linear hsl	7.9±0.30µs	7.3±0.33µs	-7.59%
Rgb family/hsl to rgb	2.5±0.12µs	2.4±0.15µs	-4.00%
Rgb family/hsv to hsl	1090.6±56.20ns	978.8±67.81ns	-10.25%
Rgb family/hsv to hwb	240.0±11.13ns	261.5±8.47ns	+8.96%
Rgb family/hsv to linear hsv	7.4±0.43µs	6.8±0.36µs	-8.11%
Rgb family/hsv to rgb	2.2±0.09µs	2.1±0.12µs	-4.55%
Rgb family/hwb to hsv	596.0±30.02ns	579.0±49.95ns	-2.85%
Rgb family/hwb to linear hwb	9.1±0.36µs	8.2±0.39µs	-9.89%
Rgb family/linear hsl to hsl	8.0±0.40µs	7.5±0.44µs	-6.25%
Rgb family/linear hsv to hsv	7.5±0.24µs	7.0±0.40µs	-6.67%
Rgb family/linear hwb to hwb	9.0±0.30µs	8.0±0.43µs	-11.11%
Rgb family/linsrgb to rgb	4.2±0.12µs	3.7±0.18µs	-11.90%
Rgb family/linsrgb to rgb - wide::f32x8	5.7±0.18µs	5.0±0.24µs	-12.28%
Rgb family/linsrgb_f32 to rgb_u8	1345.5±85.14ns	1344.5±95.20ns	-0.07%
Rgb family/linsrgb_f64 to rgb_u8	1360.0±76.62ns	1397.7±135.06ns	+2.77%
Rgb family/rgb to hsl	689.8±38.94ns	638.2±41.31ns	-7.48%
Rgb family/rgb to hsl - wide::f32x8	510.8±24.33ns	454.2±25.77ns	-11.08%
Rgb family/rgb to hsv	520.9±23.55ns	491.3±31.69ns	-5.68%
Rgb family/rgb to hsv - wide::f32x8	455.9±22.71ns	466.0±28.06ns	+2.22%
Rgb family/rgb to linsrgb	4.1±0.23µs	4.2±0.16µs	+2.44%
Rgb family/rgb to linsrgb - wide::f32x8	3.3±0.20µs	3.4±0.15µs	+3.03%
Rgb family/rgb_u8 to linsrgb_f32	345.9±12.55ns	311.1±12.53ns	-10.06%
Rgb family/rgb_u8 to linsrgb_f64	314.3±17.95ns	338.6±14.34ns	+7.73%
Rgb family/xyz to linsrgb	371.0±23.45ns	359.7±25.67ns	-3.05%
Rgb family/xyz to linsrgb - wide::f32x8	265.2±12.92ns	244.9±13.42ns	-7.65%

[Ogeon]

bors r+

[bors]

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