[FEAT] Add support for MSYS2

[BrycensRanch]

I'd like to thank you so much for your work. It's amazing. Currently, I am working on a project and it depends on the MSYS2 environment on Windows. I see your project supports Cygwin, but, I need MSYS2.

My error:

Brycen@VENATOR-PH315 CLANG64 ~/ShareX-Linux-Port/ShareX.GTK4
$ "C:\Program Files\dotnet\dotnet.exe" build
Restore complete (0.3s)
  ShareX.GTK4 failed with 1 error(s) (0.1s)
    C:\Users\Brycen\.nuget\packages\gitinfo\3.3.5\build\GitInfo.targets(342,5): error MSB6003:
      The specified task executable "cmd.exe" could not be run. System.IO.DirectoryNotFoundException: The working directo
      ry "C:\home\Brycen\ShareX-Linux-Port\" does not exist.
         at Microsoft.Build.Utilities.ToolTask.GetProcessStartInfo(String pathToTool, String commandLineCommands, String
      responseFileSwitch)
         at Microsoft.Build.Utilities.ToolTask.ExecuteTool(String pathToTool, String responseFileCommands, String command
      LineCommands)
         at Microsoft.Build.Tasks.Exec.ExecuteTool(String pathToTool, String responseFileCommands, String commandLineComm
      ands)
         at Microsoft.Build.Utilities.ToolTask.Execute()

Build failed with 1 error(s) in 0.8s

My environment:

Brycen@VENATOR-PH315
--------------------
OS: Windows 11 (Pro) x86_64
Host: Predator PH315-54 (V1.15)
Kernel: WIN32_NT 10.0.26100.2033 (24H2)
Uptime: 39 mins
Packages: 222 (pacman), 4 (scoop), 15 (choco)
Shell: bash 5.2.37
Display (LG ULTRAGEAR): 1920x1080 @ 165 Hz in 32″ [External] *
Display (BOE08B3): 1920x1080 @ 144 Hz in 16″ [Built-in] [HDR]
Display (E24): 1920x1080 @ 75 Hz in 24″ [External]
DE: Fluent
WM: Desktop Window Manager
WM Theme: Custom - Blue (System: Dark, Apps: Dark)
Font: Segoe UI (12pt) [Caption / Menu / Message / Status]
Cursor: Windows Default (32px)
Terminal: Windows Terminal
CPU: 11th Gen Intel(R) Core(TM) i7-11800H (16) @ 2.30 GHz
GPU 1: Intel(R) UHD Graphics (128.00 MiB) [Integrated]
GPU 2: NVIDIA GeForce RTX 3060 Laptop GPU (5.86 GiB) [Discrete]
Memory: 9.87 GiB / 15.78 GiB (63%)
Swap: 135.17 MiB / 13.00 GiB (1%)
Disk (C:\): 211.99 GiB / 231.37 GiB (92%) - NTFS
Disk (D:\): 384.02 GiB / 474.64 GiB (81%) - Btrfs
Disk (E:\): 856.24 GiB / 931.51 GiB (92%) - Btrfs
Battery: 80% [AC Connected]
Locale: en-US

The difference between Cygwin and MSYS2? https://www.msys2.org/wiki/How-does-MSYS2-differ-from-Cygwin/

[BrycensRanch]

No longer needed thanks to #369