Add scripts for backing up TmNationsForever

scripts/Windows/Software/TrackMania Nations Forever/Manage.ps1

@@ -0,0 +1,15 @@
+Import-Module "$PSScriptRoot/../../Scripts/Context.ps1" -Force;
+$path = "$HOME/Documents/TmForever";
+$softwareName = "TmNationsForever";
+
+function Invoke-BackupTmNations([Context] $context) {
+    Write-Host "$PSScriptRoot";
+    Start-Process -WorkingDirectory "$path" `
+        -FilePath "7z" `
+        -ArgumentList @(
+            "a",
+            "-i@`"$PSScriptRoot/include.txt`"",
+            $context.SoftwareArchive($softwareName)) `
+        -Wait `
+        -NoNewWindow;
+}

scripts/Windows/Software/TrackMania Nations Forever/include.txt

@@ -0,0 +1,7 @@
+ChallengeMusics
+MediaTracker
+MenuMusics
+Painter
+Scores
+Skins
+Tracks