🩹 [Patch]: Add WorkingDirectory and align naming of internal envvar which are mapped to inputs

[MariusStorhaug]

Description

This pull request includes several updates to the workflow configuration files, documentation, and scripts to improve the setup and execution of tests. The most important changes include the addition of a new input parameter WorkingDirectory, updates to environment variable names, and corrections to default values and paths.

Updates to workflow configuration:

• .github/workflows/Action-Test.yml:
  • Added WorkingDirectory input parameter and updated Path and SettingsFilePath values to reflect the new structure.

Documentation updates:

• README.md:
  • Updated the default value for Path and added a description for the new WorkingDirectory input parameter.

Updates to action inputs:

• action.yml:
  • Added WorkingDirectory input parameter and updated environment variable names and default values for consistency.

Script updates:

• scripts/main.ps1:
  • Updated environment variable names to use the new naming convention.
  • scripts/tests/PSScriptAnalyzer/PSScriptAnalyzer.Container.ps1: Updated environment variable names to use the new naming convention.

Type of change

• 📖 [Docs]
• 🪲 [Fix]
• 🩹 [Patch]
• ⚠️ [Security fix]
• 🚀 [Feature]
• 🌟 [Breaking change]

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas