Add pre-launch and post-exit powershell scripts (#307)

* Add files via upload

* cleanup

* a

* Update post-exit.ps1

* parity

* Update pre-launch.ps1

Co-authored-by: Madis Otenurm <Madis0@users.noreply.github.com>

Packwiz/post-exit.ps1

@@ -0,0 +1,12 @@
+# By Ultrasonic1209
+
+# Restore packwiz disabled mods to prevent useless redownload
+Write-Output "Restoring overridden mods for future launches..."
+Set-Location ".\mods"
+
+$mods = Get-ChildItem *.jar.disabled
+
+foreach ( $mod in $mods ) {
+    Move-Item -Path $mod.name -Destination ($mod.FullName).Replace(".disabled","") -Force
+    Write-Output "$($mod.name.Replace(".disabled", '')) restored successfully!"
+}

Packwiz/pre-launch.ps1

@@ -0,0 +1,40 @@
+# By Ultrasonic1209
+
+$mods = @(
+    'ModYouDislike.jar'
+    'AnotherMod.jar'
+)
+
+# Upgrading Fabulously Optimized
+Write-Output "Checking for FO updates..."
+Set-Location ..
+
+$json = Get-Content "mmc-pack.json" | ConvertFrom-Json
+
+$table = $json.components | Where-Object { $_.cachedName -eq "Minecraft" }
+$mcVersion = $table.version
+
+if (Test-Path -Path ".\.minecraft") {
+    Set-Location ".\.minecraft"
+} else {
+    Set-Location ".\minecraft"
+}
+
+$processOptions = @{
+    FilePath = $Env:INST_JAVA
+    ArgumentList = "-jar packwiz-installer-bootstrap.jar",
+        "https://raw.githubusercontent.com/Fabulously-Optimized/fabulously-optimized/main/Packwiz/$mcVersion/pack.toml"
+}
+Start-Process @processOptions -Wait
+
+# Disabling the mods
+Write-Output "Disabling mods..."
+
+Set-Location ".\mods"
+foreach ($mod in $mods) {
+    Move-Item -Path $mod -Destination "$mod.disabled" -Force
+
+    if ($?) {
+        Write-Output "$mod disabled successfully!"
+    }
+}