Add Color model among other things

Shared/ColorModel.swift

@@ -0,0 +1,65 @@
+//
+//  ColorModel.swift
+//  OnCue
+//
+//  Created by Pradyun Setti on 22/06/2024.
+//
+
+import Foundation
+import SwiftUI
+
+extension Color {
+    init?(hex: String) {
+        var hexSanitized = hex.trimmingCharacters(in: .whitespacesAndNewlines)
+        hexSanitized = hexSanitized.replacingOccurrences(of: "#", with: "")
+        
+        var rgb: UInt64 = 0
+        
+        var r: CGFloat = 0.0
+        var g: CGFloat = 0.0
+        var b: CGFloat = 0.0
+        var a: CGFloat = 1.0
+        
+        let length = hexSanitized.count
+        
+        guard Scanner(string: hexSanitized).scanHexInt64(&rgb) else { return nil }
+        
+        if length == 6 {
+            r = CGFloat((rgb & 0xFF0000) >> 16) / 255.0
+            g = CGFloat((rgb & 0x00FF00) >> 8) / 255.0
+            b = CGFloat(rgb & 0x0000FF) / 255.0
+            
+        } else if length == 8 {
+            r = CGFloat((rgb & 0xFF000000) >> 24) / 255.0
+            g = CGFloat((rgb & 0x00FF0000) >> 16) / 255.0
+            b = CGFloat((rgb & 0x0000FF00) >> 8) / 255.0
+            a = CGFloat(rgb & 0x000000FF) / 255.0
+            
+        } else {
+            return nil
+        }
+        
+        self.init(red: r, green: g, blue: b, opacity: a)
+    }
+    
+    func toHex() -> String? {
+        let uic = UIColor(self)
+        guard let components = uic.cgColor.components, components.count >= 3 else {
+            return nil
+        }
+        let r = Float(components[0])
+        let g = Float(components[1])
+        let b = Float(components[2])
+        var a = Float(1.0)
+        
+        if components.count >= 4 {
+            a = Float(components[3])
+        }
+        
+        if a != Float(1.0) {
+            return String(format: "%02lX%02lX%02lX%02lX", lroundf(r * 255), lroundf(g * 255), lroundf(b * 255), lroundf(a * 255))
+        } else {
+            return String(format: "%02lX%02lX%02lX", lroundf(r * 255), lroundf(g * 255), lroundf(b * 255))
+        }
+    }
+}