compile.ps1 script to compile MQL files

[kenorb]

• File: .github/workflows/scripts/compile.ps1
• Action: .github/workflows/compile.yml
• Branch: dev

Finish compile.ps1 to compile all MQL files and check for errors. Instead of Ruby, you can use PowerShell syntax.

Refs:

• https://stackoverflow.com/questions/26891275/powershell-select-string-from-file-with-regex
• https://techtalk.gfi.com/windows-powershell-extracting-strings-using-regular-expressions/