PowerShell script analyzer and CI (exercism#1496)

* ps1 script analyzer and yml ci

* analyze and check package

* add comments and remove header for pssa

.github/workflows/pssanalyzer.yml

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+name: Run PSScriptAnalyzer
+
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  analyze:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f # 2.3.4
+      - run: pwsh ./powershell-script-analyzer.ps1

powershell-script-analyzer.ps1

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+<#
+.SYNOPSIS
+    Test the PowerShell scripts in the folders.
+.DESCRIPTION
+    Test the PowerShell strict correctness with https://github.com/PowerShell/PSScriptAnalyzer.
+.EXAMPLE
+    The example below will verify all the scripts in the repository
+    PS C:\> ./powershell-script-analyzer.ps1
+#>
+
+# Install PSScriptAnalyzer only if not already available.
+if (!(Get-Module -ListAvailable -Name PSScriptAnalyzer)) {
+    Set-PSRepository -Name PSGallery -InstallationPolicy Trusted
+    Install-Module PSScriptAnalyzer -Scope CurrentUser -Repository PSGallery -Force
+}
+
+Import-Module PSScriptAnalyzer
+$PSSAResults = Invoke-ScriptAnalyzer -Path . -ExcludeRule PSAvoidTrailingWhitespace -Recurse
+$DETAILS = ($PSSAResults | ForEach-Object { "{0,-11} [{1,-3}, {2,-3}] {3,-50} {4,-35} - {5}" -f $_.Severity, $_.Line, $_.Column, $_.ScriptName, $_.RuleName, $_.Message } | Out-String -Width 88).Trim()
+$DETAILS
+$SUMMARY = ($PSSAResults | Group-Object -Property Severity -NoElement | Foreach-Object { "$($_.Count) $($_.Name)" }) -join ", "
+$SUMMARY
+
+exit $SUMMARY.Count