[dotnet] Generate JSON serializer per protocol (#15180)

* [dotnet] Generate JSON serializer per protocol

* Make each JsonSerializerContext generated-only, separate requests and responses

* Unify request and response serialization context

* Add EventArgs to serialization, remove placeholder string

* push unpushed changes

---------

Co-authored-by: Nikolay Borisenko <[email protected]>

Author: RenderMichael

third_party/dotnet/devtools/src/generator/CodeGen/ProtocolGenerator.cs

@@ -80,7 +80,8 @@ public override IDictionary<string, string> GenerateCode(ProtocolDefinition.Prot
                 domains = domains,
                 commands = commands,
                 events = events,
-                types = types.Values.ToList()
+                types = types.Values.ToList(),
+                protocolVersion = Settings.RootNamespace.Split('.').Last()
             };
 
             var result = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);

third_party/dotnet/devtools/src/generator/Templates/DevToolsSessionDomains.hbs

@@ -8,6 +8,11 @@ namespace {{rootNamespace}}
     ///</summary>
     public class DevToolsSessionDomains : OpenQA.Selenium.DevTools.DevToolsSessionDomains
     {
+        internal static readonly global::System.Text.Json.JsonSerializerOptions JsonOptions = new()
+        {
+            TypeInfoResolver = {{protocolVersion}}JsonSerializerContext.Default
+        };
+
 {{#each domains}}
         private Lazy<{{dehumanize Name}}.{{dehumanize Name}}Adapter> m_{{dehumanize Name}};
 {{/each}}
@@ -43,4 +48,14 @@ namespace {{rootNamespace}}
 {{/each}}
         }
     }
+
+{{#each commands}}
+    [global::System.Text.Json.Serialization.JsonSerializable(typeof({{FullTypeName}}))]
+    [global::System.Text.Json.Serialization.JsonSerializable(typeof({{FullResponseTypeName}}))]
+{{/each}}
+{{#each events}}
+    [global::System.Text.Json.Serialization.JsonSerializable(typeof({{fullTypeName}}))]
+{{/each}}
+    [global::System.Text.Json.Serialization.JsonSourceGenerationOptions(Converters = [typeof(OpenQA.Selenium.DevTools.Json.StringConverter)])]
+    internal sealed partial class {{protocolVersion}}JsonSerializerContext : global::System.Text.Json.Serialization.JsonSerializerContext;
 }