Reduce string allocations in IConsoleOutput implementations (#3978)

* Change IConsoleOutput.Write(string) overload parameter to ReadOnlySpan<char>

Allows the caller more flexibility about choosing a buffer per use case.

* NetOutput: Write StringBuilder directly to the std out text stream

* Add EscSeqUtils.CSI_WriteCursorPosition

Writes cursor position sequence to text writer without string allocation.

* NetOutput: Skip cursor position escape sequence string allocation

* Replace CSI_(Enable|Disable)MouseEvents static properties with readonly fields

Changed for the sake of consistency with rest of the EscSegutils fields rather than performance. Also prevents bugs from accidentally setting the properties.

* Use EscSeqUtils.CSI_Append(Foreground|Background)ColorRGB in v2 drivers

* WindowsOutput SetCursorVisibility: Remove intermediate string builder

* WindowsOutput.WriteToConsole: Use rented array as intermediate write buffer

The large intermediate string builder remains a challenge. :)

* NetOutput: Console.Out for the sake of consistency

Also might have missed one of the Console.Out.Write(StringBuilder) calls...

* Avoid Rune.ToString() in NetOutput.Write(IOutputBuffer)

---------

Co-authored-by: Tig <tig@users.noreply.github.com>

Benchmarks/ConsoleDrivers/EscSeqUtils/CSI_SetVsWrite.cs

@@ -0,0 +1,31 @@
+using BenchmarkDotNet.Attributes;
+using Tui = Terminal.Gui;
+
+namespace Terminal.Gui.Benchmarks.ConsoleDrivers.EscSeqUtils;
+
+[MemoryDiagnoser]
+// Hide useless column from results.
+[HideColumns ("writer")]
+public class CSI_SetVsWrite
+{
+    [Benchmark (Baseline = true)]
+    [ArgumentsSource (nameof (TextWriterSource))]
+    public TextWriter Set (TextWriter writer)
+    {
+        writer.Write (Tui.EscSeqUtils.CSI_SetCursorPosition (1, 1));
+        return writer;
+    }
+
+    [Benchmark]
+    [ArgumentsSource (nameof (TextWriterSource))]
+    public TextWriter Write (TextWriter writer)
+    {
+        Tui.EscSeqUtils.CSI_WriteCursorPosition (writer, 1, 1);
+        return writer;
+    }
+
+    public static IEnumerable<object> TextWriterSource ()
+    {
+        return [StringWriter.Null];
+    }
+}