Reduce legacy Windows driver ANSI escape sequence intermediate string allocations

[TheTonttu]

Fixes

• Improves Intermediate heap allocations #2725 for Windows Driver

Proposed Changes

• Add new methods to EscSeqUtils that append directly to StringBuilder.
• Use the new methods in Windows Console and Driver.

Pull Request checklist

• I've named my PR in the form of "Fixes #issue. Terse description."
• My code follows the style guidelines of Terminal.Gui - if you use Visual Studio, hit CTRL-K-D to automatically reformat your files before committing.
• My code follows the Terminal.Gui library design guidelines
• I ran dotnet test before commit
• I have made corresponding changes to the API documentation (using /// style comments)
• My changes generate no new warnings
• I have checked my code and corrected any poor grammar or misspellings
• I conducted basic QA to assure all features are working

Drivers

This should be applicable to the other drivers as well. I can of course make the changes if necessary but I have no WSL set up at the moment so I can only test the NetDriver.

UICatalog Benchmark

Average time for me improved from ~22 sec to ~21 sec +/- 1 sec.

Microbenchmarks

BenchmarkDotNet v0.14.0, Windows 10 (10.0.19045.5487/22H2/2022Update)
AMD Ryzen 7 5800X3D, 1 CPU, 16 logical and 8 physical cores
.NET SDK 8.0.406
  [Host]     : .NET 8.0.13 (8.0.1325.6609), X64 RyuJIT AVX2
  DefaultJob : .NET 8.0.13 (8.0.1325.6609), X64 RyuJIT AVX2

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
Set	162.82 ns	2.867 ns	2.394 ns	1.00	0.02	0.0026	136 B	1.00
Append	49.61 ns	0.905 ns	0.846 ns	0.30	0.01	-	-	0.00

Allocations

Before

After

[tznind]

The existing drivers should be replaced in due course by #3837 so may not be worth investing a lot of time optimising

But up to you. Changeover will only happen after period of both running side by side

[TheTonttu]

The existing drivers should be replaced in due course by #3837 so may not be worth investing a lot of time optimising

But up to you. Changeover will only happen after period of both running side by side

Neat! I agree, seems a bit pointless to poke the current drivers any further then. Thankfully the new methods can also be utilized in the new drivers.

[TheTonttu]

Grats, the new drivers were merged while I was writing. 🎉