Squashed commit of the following:

commit 62e7cb88f4
Author: Gisle Aune <dev@gisle.me>
Date:   Mon Feb 28 22:52:06 2022 +0100

    refactor color system to be separate from models, also move errors out of models.

commit df865574bf
Author: Gisle Aune <dev@gisle.me>
Date:   Mon Feb 21 19:27:42 2022 +0100

    rework color system and make it work with drivers.

cmd/bridgetest/main.go

@@ -7,6 +7,7 @@ import (
 	"flag"
 	"fmt"
 	"git.aiterp.net/lucifer/new-server/app/config"
+	"git.aiterp.net/lucifer/new-server/internal/color"
 	"git.aiterp.net/lucifer/new-server/models"
 	"log"
 	"os"
@@ -124,7 +125,7 @@ func main() {
 				continue
 			}
 
-			color, err := models.ParseColorValue(tokens[2])
+			color, err := color.Parse(tokens[2])
 			if err != nil {
 				_, _ = fmt.Fprintln(os.Stderr, "Invalid color:", err)
 				continue