In a push to automate project builds, this changes the build script from a BAT script to a PowerShell script. This is a cross-platform solution that should allow us to build the project within the `mcr.microsoft.com/dotnet/sdk:6.0` docker image (Debian).
Also updates the README to list PowerShell 7 as a dependency as the `pwsh` tool is not available in Windows PowerShell (v5).
Co-authored-by: Refringe <brownelltyler@gmail.com>
Reviewed-on: SPT-AKI/Modules#87
Co-authored-by: Refringe <refringe@noreply.dev.sp-tarkov.com>
Co-committed-by: Refringe <refringe@noreply.dev.sp-tarkov.com>
