separate all customize views into their own files

make corner radius a constant
create the views in the main app file and pass through so they dont get re-drawn when changing UI things

Shared/Models/DaysFilterClass.swift

@@ -8,6 +8,8 @@
 import SwiftUI
 
 class DaysFilterClass: ObservableObject {
+    static let shared = DaysFilterClass()
+    
     @Published public var currentFilters = [Int]()
     
     init() {