Moved analyzer tests to its own project

Also moves tests to `./test` which makes it possible
for all test projects to share the same .editorconfig
files and similar.

test/Spectre.Console.Tests/Unit/AnsiConsoleTests.Cursor.cs

@@ -0,0 +1,52 @@
+using Shouldly;
+using Spectre.Console.Testing;
+using Xunit;
+
+namespace Spectre.Console.Tests.Unit
+{
+    public partial class AnsiConsoleTests
+    {
+        public sealed class Cursor
+        {
+            public sealed class TheMoveMethod
+            {
+                [Theory]
+                [InlineData(CursorDirection.Up, "HelloWorld")]
+                [InlineData(CursorDirection.Down, "HelloWorld")]
+                [InlineData(CursorDirection.Right, "HelloWorld")]
+                [InlineData(CursorDirection.Left, "HelloWorld")]
+                public void Should_Return_Correct_Ansi_Code(CursorDirection direction, string expected)
+                {
+                    // Given
+                    var console = new TestConsole().EmitAnsiSequences();
+
+                    // When
+                    console.Write("Hello");
+                    console.Cursor.Move(direction, 2);
+                    console.Write("World");
+
+                    // Then
+                    console.Output.ShouldBe(expected);
+                }
+            }
+
+            public sealed class TheSetPositionMethod
+            {
+                [Fact]
+                public void Should_Return_Correct_Ansi_Code()
+                {
+                    // Given
+                    var console = new TestConsole().EmitAnsiSequences();
+
+                    // When
+                    console.Write("Hello");
+                    console.Cursor.SetPosition(5, 3);
+                    console.Write("World");
+
+                    // Then
+                    console.Output.ShouldBe("HelloWorld");
+                }
+            }
+        }
+    }
+}