Add status support

docs/input/appendix/spinners.md

@@ -0,0 +1,43 @@
+Title: Spinners
+Order: 4
+---
+
+For all available spinners, see https://jsfiddle.net/sindresorhus/2eLtsbey/embedded/result/
+
+# Usage
+
+Spinners can be used with [Progress](xref:progress) and [Status](xref:status).
+
+```csharp
+AnsiConsole.Status()
+    .Spinner(Spinner.Known.Star)
+    .Start("Thinking...", ctx => {
+        // Omitted
+    });
+```
+
+# Implementing a spinner
+
+To implement your own spinner, all you have to do is 
+inherit from the `Spinner` base class.
+
+In the example below, the spinner will alterate between
+the characters `A`, `B` and `C` every 100 ms.
+
+```csharp
+public sealed class MySpinner : Spinner
+{
+    // The interval for each frame
+    public override TimeSpan Interval => TimeSpan.FromMilliseconds(100);
+    
+    // Whether or not the spinner contains unicode characters
+    public override bool IsUnicode => false;
+
+    // The individual frames of the spinner
+    public override IReadOnlyList<string> Frames => 
+        new List<string>
+        {
+            "A", "B", "C",
+        };
+}
+```

docs/input/assets/js/table-search.js

@@ -31,5 +31,4 @@ $(document).ready(function () {
         }; // keyup
     })
 
-
 }); // ready

docs/input/status.md

@@ -0,0 +1,60 @@
+Title: Status
+Order: 6
+---
+
+Spectre.Console can display information about long running tasks in the console. 
+
+<img src="assets/images/status.gif" style="max-width: 100%;margin-bottom:20px;">
+
+If the current terminal isn't considered "interactive", such as when running 
+in a continuous integration system, or the terminal can't display 
+ANSI control sequence, any progress will be displayed in a simpler way.
+
+# Usage
+
+```csharp
+// Synchronous
+AnsiConsole.Status()
+    .Start("Thinking...", ctx => 
+    {
+        // Simulate some work
+        AnsiConsole.MarkupLine("Doing some work...");
+        Thread.Sleep(1000);
+        
+        // Update the status and spinner
+        ctx.Status("Thinking some more");
+        ctx.Spinner(Spinner.Known.Star);
+        ctx.SpinnerStyle(Style.Parse("green"));
+
+        // Simulate some work
+        AnsiConsole.MarkupLine("Doing some more work...");
+        Thread.Sleep(2000);
+    });
+```
+
+## Asynchronous progress
+
+If you prefer to use async/await, you can use `StartAsync` instead of `Start`.
+
+```csharp
+// Asynchronous
+await AnsiConsole.Status()
+    .StartAsync("Thinking...", async ctx => 
+    {
+        // Omitted
+    });
+```
+
+# Configure
+
+```csharp
+AnsiConsole.Status()
+    .AutoRefresh(false)
+    .Spinner(Spinner.Known.Star)
+    .SpinnerStyle(Style.Parse("green bold"))
+    .Start("Thinking...", ctx => 
+    {
+        // Omitted
+        ctx.Refresh();
+    });
+```