lrclib api option, many improvements and refactoring

Sources/EeveeSpotify/Settings/Lyrics/ViewModifiers/DynamicIconModifier.swift

@@ -0,0 +1,25 @@
+import SwiftUI
+
+struct DynamicIconModifier: ViewModifier {
+    var systemName: String
+    var color: Color
+    @Binding var condition: Bool
+    
+    func body(content: Content) -> some View {
+        HStack {
+            if condition {
+                Image(systemName: systemName)
+                    .font(.title2)
+                    .foregroundColor(color)
+            }
+            
+            content
+        }
+    }
+}
+
+extension View {
+    func icon(_ systemName: String, color: Color, when condition: Binding<Bool>) -> some View {
+        modifier(DynamicIconModifier(systemName: systemName, color: color, condition: condition))
+    }
+}