v1.0.0

Description

This pull request introduces the Install-PowerShell GitHub Action, simplifying installation of specific versions of PowerShell on GitHub runners.

Features:

• Cross‑platform installer – Runs on all GitHub‑hosted runners (Ubuntu, macOS, Windows). Detects the OS at runtime and executes the appropriate installation routine.
• Version selector – Installs either a specific PowerShell Core version (e.g. 7.4.1) or the latest stable release when Version: latest is supplied (default).
• Smart skip logic – Checks the currently installed PowerShell version and skips installation when the requested version is already present, saving time and CI minutes.
• Native package managers first
  • Linux (Debian/Ubuntu): Uses APT, falling back to direct .deb download if the exact version isn’t in the repo.
  • macOS: Prefers Homebrew Cask; falls back to the official .pkg installer (ARM64/x64 aware).
  • Windows: Downloads the official MSI and installs silently with msiexec.

Metadata Updates:

• Action Metadata Update: Updated action.yml to reflect the new functionality, including a description, branding changes, and streamlined inputs. Removed unnecessary inputs like Debug and Verbose. action.yml

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