feat: mosaic support (halfblocks)

[raphamorim]

Convert images to strings using half blocks symbols

TODO

• Rework API to mosaic.New().Width(100).Height(40).Render(img)
• Use draw.Scaler
• Use draw.FloydSteinberg

Added examples

Simple Example

func main() {
	dogImg, err := loadImage("./pekinas.jpg")
	if err != nil {
		fmt.Print(err)
		os.Exit(1)
	}

	m := mosaic.New().Width(80).Height(80).Scale(2)

	fmt.Println(lipgloss.JoinVertical(lipgloss.Right, lipgloss.JoinHorizontal(lipgloss.Center, m.Render(dogImg))))
}

Scaling

Scales uses bilinear, which works at least as well as the others do in every situation. So prob use Bilinear for upscaling and downscaling as default.

scaling 1x and 2x:

Other examples

Related

• feat: halfblocks support #387
• feat: mosaic (halfblocks graphics) support lipgloss#482

[aymanbagabas]

few nit picks, other than that, lgtm