feat: gowall color command and color theory utilities

[Achno]

1. Convert Command
   Converts a color between different formats (hex, rgb, hsl, lab). The -t flag specifies the target format (default: rgb).

gowall color convert "#FF5733" -t hsl
#FF5733  ->  hsl(11,100,60)

gowall color convert "rgb(255,87,51)" -t lab 
# rgb(255,87,51)   ->  lab(60.18,62.06,54.34)

2. Light Command
   Lightens a color by a specified amount. The --factor or -f flag controls how much to lighten (0.0 to 1.0, where 0.3 means 30% lighter, default: 0.3).

gowall color light "#FF5733" -f 0.3

3. Dark Command
   Darkens a color by a specified amount. The --factor or -f flag controls how much to darken (0.0 to 1.0, where 0.2 means 20% darker, default: 0.3).

gowall color dark "#FF5733" -f 0.4

4. Blends between 2 colors. The -n flag controls how many colors to generate between these 2 colors. (Default 3)

gowall color blend #FFC771 #ff34ff -n 4

5. Variants Command (Shades,Tints,Tones,Monochrome)
   Generates color variants (shades, tints, tones, monochrome) of a color. The --type or -t flag specifies the variant type (default: shades). The --number or -n flag controls how many variants to generate (default: 5)

gowall color variants "#ff23ff" -t shades -n 8
gowall color variants "#ff23ff" -t tones
gowall color variants "#ff23ff" -t tints
gowall color variants "#ff23ff" -t monochrome

6. Wheel Command
   Generates color wheel schemes (triadic, quadratic, analogous, split-complementary). The --type or -t flag specifies the scheme type (default: triadic).

gowall color wheel "#FF5733" -t triadic
gowall color wheel "#FF5733" -t quadratic
gowall color wheel "#FF5733" -t analogous
gowall color wheel "#FF5733" -t split-complementary

7. Gradient Command

Generates gradients with 2+ colors.

• -d is the dimensions flag. For example -d 1920x1080 and in that specific format.
• -r is the rotation flag. Values are vertical or horizontal
• -m is the method flag. It blends the colors in that colorspace before being converted back to rgb.
  Values are rgb, hcl, lab, hsv, luv, luvlch

gowall color gradient "#392d69,#b57bee"
gowall color gradient "#392d69,#b57bee,#ffffff"
gowall color gradient "#392d69,#b57bee,#ffffff" -r vertical -m lab -d 1920x1080

Other features

• 0:1 support for the ImageProcessor interface.
• --batch can now be normally used with the --output command