Update README with additional commands. Fix encryption algo used in docs

Author: WebDevCaptain

README.md

@@ -14,10 +14,16 @@
 
 2. **Folder Encryption/Decryption**: Compress folders into ZIP archives before encrypting them.
 
-3. **AES Encryption**: Supports AES-128 for strong security. [TODO: Support for AES-256]
+3. **AES Encryption**: Supports AES-256 for strong security.
 
 ## Usage (In development)
 
+- Help
+
+ ```bash
+ cargo run -p encryptify-cli -- --help
+ ```
+
 - Encrypt
 
  ```bash