docs: added logo to README.md

README.md

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+<img src="https://raw.githubusercontent.com/Elagoht/Passenger-Landing/main/public/assets/logo.png" width="192" height="192" />
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 # Passenger CLI
 
 ![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/Elagoht/Passenger-cli/release.yaml)
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 ![GitHub License](https://img.shields.io/github/license/Elagoht/Passenger-cli)
 
 Passenger is a sophisticated passphrase manager designed to securely store your passphrases. This project encompasses the backend and database components, leveraging AES GCM encryption alongside a user-written custom and unique symmetric encoding-decoding algorithm to ensure maximum security. The AES GCM secret key is required as an environment variable to enhance security.
+</div>
 
 ## Features