Adding more options to the SSL configuration for Server side

[constantinos-p]

Is your feature request related to a problem? Please describe.
The feature request is related to [https://github.com//issues/2039]

It seems that the MR that closed it did not address the symmetical issue on the Server.Config. I see the requirements say:
Add an option to directly pass objects of type javax.net.ssl.keyManagerFactory and javax.net.ssl.trustManagerFactory (both for both client and server contexts) . I do not see the server context in that commit.

More specifially we are currently doing something like this with the akka http server creating SslContext and pass it to the akka server which I think is pretty standard (shown below).

def fromConfig(config: KeystoreConfiguration): SSLContext = {
    val ks = KeyStore.getInstance(config.`type`)

    val keyStream = new FileInputStream(config.file)
   
     ks.load(keyStream, config.password.toCharArray)

    val kmf = KeyManagerFactory.getInstance("SunX509")
    kmf.init(ks, config.password.toCharArray)

    val tmf = TrustManagerFactory.getInstance("SunX509")
    tmf.init(ks)

    val sslContext: SSLContext = SSLContext.getInstance("TLSv1.2")
    sslContext.init(
      kmf.getKeyManagers,
      tmf.getTrustManagers,
      new SecureRandom
    )

    sslContext
  }  

Describe the solution you'd like
We would like the symmetrical feature similar to the above mentioned feature but on the server side SSLConfig

Describe alternatives you've considered
For us this is a showstopper to moving from akka. Happy to consider solutions if you have any but we wouldn't want to fork zio-http. Open to submitting a PR ourselves.

Additional context
Add any other context or screenshots about the feature request here.

[jdegoes]

cc @987Nabil let's get this one prioritized!

[constantinos-p]

I have made the changes required for server side jks keystore locally. That covers most of cases with https and will unblock me.
Should I make a PR and then @987Nabil can take from there to do the truststore part?