Set Age Restrictions on library with a slider (#468)

* Adding groups logic and restrictions

* Cleaning up some redundant code

* hastily made translations

* Linter issues

* More linting

* PR comments

* Covering other APIs with age filters per comment

* Add ages to age ratings

* Making the linter happy

---------

Co-authored-by: Robert Clabough <robert@clabough.tech>

server/i18n/locales/en_us.json

@@ -820,6 +820,8 @@
       "groups": {
         "addBannedRating": "Add banned rating",
         "addMember": "Select a user...",
+        "advancedOverrides": "Advanced: Manual Overrides",
+        "applyAgeRestriction": "Apply age restriction",
         "bannedRatings": "Banned Ratings",
         "createGroup": "Create Group",
         "deleteConfirm": "Are you sure you want to delete this group? This action cannot be undone.",
@@ -827,6 +829,9 @@
         "description": "Manage user groups and age rating restrictions.",
         "descriptionField": "Description",
         "details": "Details",
+        "manualOverrideNote": "The current banned ratings do not match a standard age threshold. They may have been manually configured.",
+        "maximumContentAge": "Age Restriction",
+        "maximumContentAgeDescription": "Set the maximum content age allowed for members of this group. Ratings above this age will be banned.",
         "members": "Members",
         "name": "Name",
         "noBannedRatings": "No banned ratings configured.",
@@ -834,6 +839,7 @@
         "oidcManagedNote": "Group membership is managed by your OIDC provider. Members are automatically synced when users log in. To change group membership, update your identity provider's group assignments.",
         "removeBannedRating": "Remove",
         "removeMember": "Remove",
+        "sliderOverrideWarning": "Manually adding or removing ratings here will override the slider. Use the slider above to reset to a standard age threshold.",
         "title": "User Groups",
         "unratedNote": "Games without age ratings will also be hidden from users in this group."
       },