Make old project runnable on Go 1.27 with mise and READMEHEADmaster

- init go.mod (Go 1.27, progressbar/v3 v3.19.1) and fix import
- fix FMin returning max, remove deprecated RenderBlank, apply go fix range loops
- add mise.toml (go 1.27, tasks: build/run/check with go fix -diff/clean)
- add focused README and update .gitignore for build artifacts

1 files changed, 4 insertions, 5 deletions

diff --git a/main.go b/main.go
index 957fc92..1330e74 100644
--- a/main.go
+++ b/main.go
@@ -5,7 +5,7 @@ import (
 	"math"
 	"math/rand"
 
-	"github.com/schollz/progressbar"
+	"github.com/schollz/progressbar/v3"
 )
 
 const (
@@ -55,14 +55,13 @@ func main() {
 	// move := Vec3D{2.0, 0.0, 0.0}
 	frame := Frame{}
 	bar := progressbar.New(Height)
-	bar.RenderBlank()
 	// for k := 0; k < FPS*DURATION; k++ {
 	// origin := AddVec3D(start, ScalarProduct(float64(k)/float64(FPS*DURATION), move))
 	// camera.origin = origin
-	for x := 0; x < Height; x++ {
-		for y := 0; y < Width; y++ {
+	for x := range Height {
+		for y := range Width {
 			var colorList [RaysPerPixel]Color
-			for it := 0; it < RaysPerPixel; it++ {
+			for it := range RaysPerPixel {
 				u := (float64(y) + rand.Float64()) / float64(Width)
 				v := (float64(x) + rand.Float64()) / float64(Height)
 				ray := camera.GetRay(u, v)