Release channel support (#239)

* Release channel support

- Show SideStore in Browse if it's not from the current SideStore source
- Change SideStore source URL and source ID based on if beta and nightly are in the version string
- Use StoreApp name for InstalledApp name to allow for source-specified name to show up in My Apps

* My Apps: Fix incorrect app name on first launch

* News: fix duplicate news items from multiple SideStore release channel sources

* Trusted Sources: Add stable and beta

AltStoreCore/Model/Source.swift

@@ -11,29 +11,37 @@ import UIKit
 
 public extension Source
 {
-    #if ALPHA
-    static let altStoreIdentifier = Bundle.Info.appbundleIdentifier
-    #else
-    static let altStoreIdentifier = Bundle.Info.appbundleIdentifier
-    #endif
+    static var altStoreIdentifier: String {
+        let appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String
+        
+        if appVersion != nil {
+            if appVersion!.contains("beta") {
+                return Bundle.Info.appbundleIdentifier + ".Beta"
+            }
+            if appVersion!.contains("nightly") {
+                return Bundle.Info.appbundleIdentifier + ".Nightly"
+            }
+        }
+        
+        return Bundle.Info.appbundleIdentifier
+    }
     
-    #if STAGING
+    static let altStoreSourceBaseURL = "https://sidestore-apps.naturecodevoid.dev/"
     
-    #if ALPHA
-    static let altStoreSourceURL = URL(string: "https://apps.sidestore.io/")!
-    #else
-    static let altStoreSourceURL = URL(string: "https://apps.sidestore.io/")!
-    #endif
-    
-    #else
-    
-    #if ALPHA
-    static let altStoreSourceURL = URL(string: "https://apps.sidestore.io/")!
-    #else
-    static let altStoreSourceURL = URL(string: "https://apps.sidestore.io/")!
-    #endif
-    
-    #endif
+    static var altStoreSourceURL: URL {
+        let appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String
+        
+        if appVersion != nil {
+            if appVersion!.contains("beta") {
+                return URL(string: altStoreSourceBaseURL + "beta")!
+            }
+            if appVersion!.contains("nightly") {
+                return URL(string: altStoreSourceBaseURL + "nightly")!
+            }
+        }
+        
+        return URL(string: altStoreSourceBaseURL)!
+    }
 }
 
 public struct AppPermissionFeed: Codable {