Docs redesign (#728)

* Adding a dark mode
* Adding reference for types to summary pages
* Adding API Reference
* Adding modifiers to methods/fields/etc
* Minimizing files input
* Caching a lot of the output pages
* Cache only for each execution
* Adding API references to existing docs

docs/input/api/Sections/_ConstantValue.cshtml.cs

@@ -0,0 +1,6 @@
+namespace Docs.input.api.Sections;
+
+public class _ConstantValue_cshtml
+{
+    
+}