refactor: rename some remaining Overseerr occurrences (#1397)

* refactor: rename some remaining Overseerr occurrences

This PR renames some remaining occurrences of Overseerr to Jellyseerr. This includes the OpenAPI
specification, log file names and some variables and console messages.

* fix(i18n): add missing translation

cypress/config/settings.cypress.json

@@ -4,7 +4,7 @@
   "vapidPublic": "BK_EpP8NDm9waor2zn6_S28o3ZYv4kCkJOfYpO3pt3W6jnPmxrgTLANUBNbbyaNatPnSQ12De9CeqSYQrqWzHTs",
   "main": {
     "apiKey": "testkey",
-    "applicationTitle": "Overseerr",
+    "applicationTitle": "Jellyseerr",
     "applicationUrl": "",
     "csrfProtection": false,
     "cacheImages": false,
@@ -71,7 +71,7 @@
           "ignoreTls": false,
           "requireTls": false,
           "allowSelfSigned": false,
-          "senderName": "Overseerr"
+          "senderName": "Jellyseerr"
         }
       },
       "discord": {