feat: Implement comprehensive Immich backup and restore scripts with validation and notification features

.github/copilot-instructions.md

@@ -7,7 +7,7 @@ This document provides context and guidance for GitHub Copilot when working with
 This repository contains:
 
 1. **Shell scripts** for system administration tasks
-2. **Dotfiles** for system configuration 
+2. **Dotfiles** for system configuration
 3. **Setup scripts** for automated environment configuration
 4. **Docker-based testing framework** for validating setup across environments
 
@@ -78,10 +78,10 @@ When modifying the testing framework:
 The Docker-based testing framework includes these key features:
 
 1. **Continuous Testing**: Tests continue running even when individual package installations fail
-   - Achieved by removing `set -e` from test scripts 
+   - Achieved by removing `set -e` from test scripts
    - Uses a counter to track errors rather than exiting immediately
 
-2. **Package Testing**: 
+2. **Package Testing**:
    - Dynamically reads packages from `setup/packages.list`
    - Tests each package individually
    - Maintains an array of missing packages for final reporting