Lint PowerShell and bash scripts.

[Qwerty-133]

We can look into https://www.shellcheck.net and https://github.com/PowerShell/PSScriptAnalyzer.

These should be added to pre-commit and into the lint workflow.

[Qwerty-133]

PSScriptAnalyzer cannot be added into pre-commit until its rewritten PowerShell/PSScriptAnalyzer#1528