update applies to syntax to include product lifecycle

src/Elastic.Markdown/IO/MarkdownFile.cs

@@ -5,6 +5,7 @@
 using Elastic.Markdown.Diagnostics;
 using Elastic.Markdown.Myst;
 using Elastic.Markdown.Myst.Directives;
+using Elastic.Markdown.Myst.FrontMatter;
 using Elastic.Markdown.Slices;
 using Markdig;
 using Markdig.Extensions.Yaml;

src/Elastic.Markdown/Myst/Directives/IncludeBlock.cs

@@ -4,6 +4,7 @@
 using System.IO.Abstractions;
 using Elastic.Markdown.Diagnostics;
 using Elastic.Markdown.IO;
+using Elastic.Markdown.Myst.FrontMatter;
 
 namespace Elastic.Markdown.Myst.Directives;
 

src/Elastic.Markdown/Myst/FrontMatter/FrontMatterParser.cs

@@ -0,0 +1,46 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+using YamlDotNet.Serialization;
+
+namespace Elastic.Markdown.Myst.FrontMatter;
+
+[YamlStaticContext]
+public partial class YamlFrontMatterStaticContext;
+
+[YamlSerializable]
+public class YamlFrontMatter
+{
+	[YamlMember(Alias = "title")]
+	public string? Title { get; set; }
+
+	[YamlMember(Alias = "navigation_title")]
+	public string? NavigationTitle { get; set; }
+
+	[YamlMember(Alias = "sub")]
+	public Dictionary<string, string>? Properties { get; set; }
+
+
+	[YamlMember(Alias = "applies")]
+	public Deployment? AppliesTo { get; set; }
+}
+
+public static class FrontMatterParser
+{
+	public static YamlFrontMatter Deserialize(string yaml)
+	{
+		var input = new StringReader(yaml);
+
+		var deserializer = new StaticDeserializerBuilder(new YamlFrontMatterStaticContext())
+			.IgnoreUnmatchedProperties()
+			.WithTypeConverter(new SemVersionConverter())
+			.WithTypeConverter(new DeploymentConverter())
+			.Build();
+
+		var frontMatter = deserializer.Deserialize<YamlFrontMatter>(input);
+		return frontMatter;
+
+	}
+}
+

src/Elastic.Markdown/Myst/MarkdownParser.cs

@@ -7,6 +7,7 @@
 using Elastic.Markdown.IO;
 using Elastic.Markdown.Myst.Comments;
 using Elastic.Markdown.Myst.Directives;
+using Elastic.Markdown.Myst.FrontMatter;
 using Elastic.Markdown.Myst.InlineParsers;
 using Elastic.Markdown.Myst.Substitution;
 using Markdig;

src/Elastic.Markdown/Myst/ParserContext.cs

@@ -4,6 +4,7 @@
 
 using System.IO.Abstractions;
 using Elastic.Markdown.IO;
+using Elastic.Markdown.Myst.FrontMatter;
 using Markdig;
 using Markdig.Parsers;