`tweasel --version` should also show the versions of the most important dependencies

Similar to what mitmproxy does:

```sh
❯ mitmproxy --version
Mitmproxy: 9.0.1
Python:    3.11.6
OpenSSL:   OpenSSL 3.0.7 1 Nov 2022
Platform:  Linux-6.5.0-27-generic-x86_64-with-glibc2.38
```

cf. how I'm getting the versions in https://github.com/tweaselORG/cyanoacrylate/pull/41