Macro based location aware logging.

[FunFunFine]

This PR adds Location data type and a special version of tofu.syntax.logging called tofu.syntax.location.logging which is aware of the location where the call was made.

Basically, it allows one to have one global logger (while ignoring SLF4J location) and use it like that:

package my.cool.service

import cats.effect.IO
import tofu.syntax.location.logging._

class MyService(myDeps: Deps) {
  implicit val logger = Logs.plain[IO].forService[MyService]
  
  def doSomething(arg: Arg): IO[Result] = 
   for {
    _ <- trace"Gonna do stuff"
    result <- myDeps.foo(arg)
   _ <- info"Done stuff and got $result"
   } yield ()
}

Location will be put as an additional LoggedValue and will look something like that:

my.cool.service.MyService.doSomething@(MyService.scala:10)

Main goal of this PR is to discuss and add Location and macro for it. All other improvements (such as integration with SLF4J and global logger) should be done later.