Refactor documentation and enhance Immich backup system

- Updated README.md to streamline content and improve navigation with a new Quick Navigation section.
- Consolidated detailed Plex backup descriptions into dedicated documentation files.
- Added comprehensive Docker Bootstrap Testing Framework documentation.
- Created Immich backup enhancement summary and migration summary documents.
- Implemented webhook notifications and Backblaze B2 integration in Immich backup scripts.
- Centralized logging for Immich backup operations and updated configuration requirements.
- Restructured Telegram bot project documentation for better clarity and organization.
- Enhanced .gitignore to include environment files and Backblaze CLI tool.
- Updated dotfiles README to reference new testing documentation.

Resolves Documentation review #11.

.env.example

@@ -0,0 +1,14 @@
+# Immich Configuration for Testing
+DB_USERNAME=postgres
+DB_DATABASE_NAME=immich
+UPLOAD_LOCATION=/mnt/share/media/immich/uploads
+
+# Notification settings
+WEBHOOK_URL="https://notify.peterwood.rocks/lab"
+
+# Backblaze B2 settings
+# Get these from your B2 account: https://secure.backblaze.com/app_keys.htm
+K005YB4icG3edh5Z9o64ieXvepEYWoA
+# B2_APPLICATION_KEY_ID=your_key_id_here
+# B2_APPLICATION_KEY=your_application_key_here
+# B2_BUCKET_NAME=your_bucket_name_here