Add dependencies for two-factor authentication in Icinga Web (#53)

Add required packages for upcoming two-factor authentication in
Icinga Web:

- `chillerlan/php-qrcode` to generate QR codes.
- `spomky-labs/otphp` to generate and validate OTP tokens.

Author: lippserd

composer.json

@@ -7,6 +7,7 @@
     "require": {
         "php": ">=8.2",
         "ext-curl": "*",
+        "chillerlan/php-qrcode": "^6.0",
         "clue/connection-manager-extra": "^1.3",
         "clue/http-proxy-react": "^1.9",
         "clue/mq-react": "^1.7",
@@ -42,6 +43,7 @@
         "react/socket": "^1.17",
         "react/stream": "^1.4",
         "simshaun/recurr": "^5.0.3",
+        "spomky-labs/otphp": "^11.4",
         "tedivm/jshrink": "^1.8.1",
         "zircote/swagger-php": "^6.0.6"
     },