Refactor logger to use the actor model

[OJarrisonn]

This PR is the starting point of the major patch-hub refactor to use the Actor Model. I decided to start it with the logger because it's the most straightforward actor in my design.

What is done?

• Add actix crate
• Replaced current logger with an actor

What's not done?

• Handle .await properly
• Fix the install_hooks since it doesn't support async move
• Mocked actor for testing
• Integration with the config options

The Design

So basically the Logger actor implements the Actor trait and I've created a couple of messages that it can handle:

• Info, Warn, Error: to log messages
• InfoOnError, WarnOnError, ErrorOnError: to log results if .is_err()
• Flush: flushes the messages to the terminal
• CollectGarbage: removes old log files

Also i used an extension trait pattern (don't know if this is a real name) to simplify the code that uses the actor. Just by implementing extension methods on Addr<Logger> to send the messages directly. Without those methods using the logger is:

// logger: Addr<Logger>
let result: Result<(), MailboxError> = logger.send(logger::Error("Something went wrong")).await;

With this pattern we create a trait LoggerActor and implement it on Addr<Logger> and then simplify the calls to just:

// logger: Addr<Logger> as LoggerActor
let result: Result<(), MailboxError> = logger.error("Something went wrong").await;

Final Considerations

This PR do not break patch-hub in any way, the app is completely functional so it's safe to be merged in that sense