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/live/live-display.md

@@ -4,13 +4,15 @@ Description: "*Spectre.Console* can update arbitrary widgets in-place."
 Highlights:
     - Update tables or graphs with new updates.
     - Create a custom progress bar that extends the existing control.
+Reference: 
+    - T:Spectre.Console.LiveDisplay
+    - M:Spectre.Console.AnsiConsole.Live(Spectre.Console.Rendering.IRenderable)
 ---
 
-Spectre.Console can update arbitrary widgets in-place.
+Spectre.Console can update arbitrary widgets in-place using the [Live Display](xref:T:Spectre.Console.LiveDisplay) widget.
 
 <?# AsciiCast cast="live" /?>
 
-
 <?# Alert ?>
   The live display is not 
   thread safe, and using it together with other interactive components such as 

docs/input/live/progress.md

@@ -6,6 +6,9 @@ Highlights:
     - Custom styling of progress bars.
     - Multiple predefined columns such as Throughput, Estimated Time Remaining, and more.
     - Fallback for non-interactive consoles such as CI runners.
+Reference: 
+    - T:Spectre.Console.Progress
+    - M:Spectre.Console.AnsiConsole.Progress
 ---
 
 Spectre.Console can display information about long running tasks in the console. 

docs/input/live/status.md

@@ -5,6 +5,9 @@ Description: "*Spectre.Console* can display information about long running tasks
 Highlights: 
     - Custom spinner control for running tasks.
     - Fallback for non-interactive consoles such as CI runners.
+Reference:
+    - T:Spectre.Console.Status
+    - M:Spectre.Console.AnsiConsole.Status
 ---
 
 Spectre.Console can display information about long running tasks in the console.