Added documentation for align widget

docs/input/assets/casts/align-rich.cast

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+{"version": 2, "width": 40, "height": 3, "timestamp": 1667342769, "env": {"SHELL": "/bin/bash", "TERM": "xterm-256color"}}
+[0.0, "o", "\u001b[H\u001b[2B\u001b[38;5;9;48;5;0mSpectre!\u001b[0m"]

docs/input/widgets/align.md

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+Title: Align
+Description: "Use **Align** to render and position widgets in the console."
+Highlights:
+    - Custom colors
+    - Labels
+    - Use your own data with a converter.
+Reference: T:Spectre.Console.Align
+
+---
+
+Use `Align` to render and position widgets in the console.
+
+<?# AsciiCast cast="align" /?>
+
+## Usage
+
+### Basic usage
+
+```csharp
+// Render an item and align it in the bottom-left corner of the console
+AnsiConsole.Write(new Align(
+            new Text("Spectre!"),
+            HorizontalAlignment.Left,
+            VerticalAlignment.Bottom
+        ));
+```
+
+### Align items from an IEnumerable
+
+```csharp
+// Create a list of items
+var alignItems = new List<Text>(){
+        new Text("Spectre"),
+        new Text("Console"),
+        new Text("Is Awesome!")
+    };
+
+// Render the items in the middle-right of the console
+AnsiConsole.Write(new Align(
+            alignItems,
+            HorizontalAlignment.Right,
+            VerticalAlignment.Middle
+        ));
+```
+
+### Dynamically align with different widgets
+
+```csharp
+// Create a table 
+var table = new Table()
+            .AddColumn("ID")
+            .AddColumn("Methods")
+            .AddColumn("Purpose")
+            .AddRow("1", "Center()", "Initializes a new instance that is center aligned")
+            .AddRow("2", "Measure()", "Measures the renderable object")
+            .AddRow("3", "Right()", "Initializes a new instance that is right aligned.");
+
+// Create a panel
+var panel = new Panel(table)
+            .Header("Other Align Methods")
+            .Border(BoxBorder.Double);
+
+// Renders the panel in the top-center of the console
+AnsiConsole.Write(new Align(panel, HorizontalAlignment.Center, VerticalAlignment.Top));
+```
+