Chemistry JSON dump tool and companion GitHub Action (#6134)

* fuck

* oh boy

* Sorted every chem into guide groups

* WHY ARE YOU NOT ABSTRACT

* removes the target thing in favor of simply generating everything.

* eee

* Add group for med

* Update wiki JSON generation to use System.Text.Json

* Fix error on shutdown during wiki JSON generation

* First pass at automatic wiki workflow

* Add a temporary workaround while the build is continuing to give errors

* Update workflow to reference correct API url, track dependency.

* Compile wiki actions into one job rather than two

* Update page name to reference editable page

* Add other JSON file and parameterize root page path

* A few steps closer to using `System.Text.Json` to serialize properly

* Revert System.Text.Json and return to Newtonsoft.Json.

* Revert the revert. Return to System.Text.Json.

This reverts commit a5ea98dfdcfab3f605ac4d82d3b110f099324308.

* Add and register UniversalJsonConverter class.

* Narrow triggers for update-wiki GitHub action.

Co-authored-by: moonheart08 <moonheart08@users.noreply.github.com>

Content.Shared/CCVar/CCVars.cs

@@ -626,5 +626,12 @@ namespace Content.Shared.CCVar
         /// </summary>
         public static readonly CVarDef<float> RulesWaitTime =
             CVarDef.Create("rules.time", 45f, CVar.SERVER | CVar.REPLICATED);
+
+        /*
+         * Autogeneration
+         */
+
+        public static readonly CVarDef<string> DestinationFile =
+            CVarDef.Create("autogen.destination_file", "", CVar.SERVER | CVar.SERVERONLY);
     }
 }