Add Maintenance Solution to module

[potatoqualitee]

It's MIT so 👍🏼 Include local copy for offline servers and/or if there's an issue downloading the latest copy.

Adding this to deployer

Remove-Item -EA SilentlyContinue -Path C:\github\dbatools\bin\maintenancesolution\*
Save-DbaCommunitySoftware -Software MaintenanceSolution -LocalDirectory C:\temp
Copy-Item -Recurse C:\temp\*maintenance-solution*\*.sql C:\github\dbatools\bin\maintenancesolution