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

trustedapps.json

@@ -4,6 +4,14 @@
     {
       "identifier": "io.sidestore.example"
     },
+    {
+      "identifier": "com.SideStore.SideStore",
+      "sourceURL": "https://sidestore-apps.naturecodevoid.dev/"
+    },
+    {
+      "identifier": "com.SideStore.SideStore.Beta",
+      "sourceURL": "https://sidestore-apps.naturecodevoid.dev/beta"
+    },
     {
       "identifier": "com.sidestoreapps.community",
       "sourceURL": "https://community-apps.sidestore.io/sidecommunity.json"