Normalize scalar frontmatter lists

MeetingAssistant/MeetingNotes/FrontmatterYamlDeserializer.cs

@@ -0,0 +1,24 @@
+using YamlDotNet.Serialization;
+using YamlDotNet.Serialization.NamingConventions;
+
+namespace MeetingAssistant.MeetingNotes;
+
+internal static class FrontmatterYamlDeserializer
+{
+    public static IDeserializer Create()
+    {
+        return new DeserializerBuilder()
+            .WithTypeConverter(new ScalarStringListYamlTypeConverter())
+            .IgnoreUnmatchedProperties()
+            .Build();
+    }
+
+    public static IDeserializer CreateWithUnderscoredNaming()
+    {
+        return new DeserializerBuilder()
+            .WithNamingConvention(UnderscoredNamingConvention.Instance)
+            .WithTypeConverter(new ScalarStringListYamlTypeConverter())
+            .IgnoreUnmatchedProperties()
+            .Build();
+    }
+}