Feature/local metadata more tags (#832)

* Stashing code

* removed some debug code on series detail page. Now detail is collapsed by default.

* Added AgeRating

* Fixed a crash when NetVips tries to write a cover file and cover directory is not existing.

* When a card is selected for bulk actions, show an outline in addition to select box

* Added AgeRating into the metadata parsing. Added a hack where ComicInfo uses Number in ComicInfo rather than Volume. This is to test out the effects on users libraries.

* Added AgeRating and ReleaseDate to the metadata implelentation.

API.Tests/Entities/ComicInfoTests.cs

@@ -0,0 +1,36 @@
+using API.Data.Metadata;
+using API.Entities.Enums;
+using Xunit;
+
+namespace API.Tests.Entities;
+
+public class ComicInfoTests
+{
+    #region ConvertAgeRatingToEnum
+
+    [Theory]
+    [InlineData("G", AgeRating.G)]
+    [InlineData("Everyone", AgeRating.Everyone)]
+    [InlineData("Mature", AgeRating.Mature)]
+    [InlineData("Teen", AgeRating.Teen)]
+    [InlineData("Adults Only 18+", AgeRating.AdultsOnly)]
+    [InlineData("Early Childhood", AgeRating.EarlyChildhood)]
+    [InlineData("Everyone 10+", AgeRating.Everyone10Plus)]
+    [InlineData("Mature 15+", AgeRating.Mature15Plus)]
+    [InlineData("Mature 17+", AgeRating.Mature17Plus)]
+    [InlineData("Rating Pending", AgeRating.RatingPending)]
+    [InlineData("X 18+", AgeRating.X18Plus)]
+    [InlineData("Kids to Adults", AgeRating.KidsToAdults)]
+    [InlineData("NotValid", AgeRating.Unknown)]
+    public void ConvertAgeRatingToEnum_ShouldConvertCorrectly(string input, AgeRating expected)
+    {
+        Assert.Equal(expected, ComicInfo.ConvertAgeRatingToEnum(input));
+    }
+
+    [Fact]
+    public void ConvertAgeRatingToEnum_ShouldCompareCaseInsensitive()
+    {
+        Assert.Equal(AgeRating.Mature, ComicInfo.ConvertAgeRatingToEnum("mature"));
+    }
+    #endregion
+}