feat: initial install-prerequisites script that install vscode, git and powershell 7

INSTALLATION.md

@@ -2,6 +2,29 @@
 
 This guide will help you install everything needed for the Git Workshop on Windows 11.
 
+## Quick Start (Automated Installation)
+
+**Easiest option:** Run our one-shot installation script that automatically installs all required tools using winget.
+
+1. Open **PowerShell** or **Windows Terminal**
+2. Navigate to the git-workshop directory
+3. Run the installation script:
+
+```powershell
+.\install-prerequisites.ps1
+```
+
+The script will:
+- Check if tools are already installed
+- Install PowerShell 7, Git 2.23+, and Visual Studio Code
+- Prompt you for optional tools (Python 3.12, Windows Terminal)
+- Show clear progress and verify each installation
+- Display Git configuration instructions when complete
+
+**If you prefer manual installation**, continue with the detailed steps below.
+
+---
+
 ## Prerequisites
 
 You'll need administrator access to install software on your Windows 11 machine.
@@ -12,7 +35,7 @@ You'll need administrator access to install software on your Windows 11 machine.
 2. **Git** - Version control system (2.23 or later)
 3. **Visual Studio Code** - Modern code editor with excellent Git integration
 
-## Installation Steps
+## Manual Installation Steps
 
 ### 1. Install PowerShell 7