Fix source and browse utilities to be able to use out of the box

[tanishiking]

fix #1254

This PR enables Ammonite-REPL to use browse and source built-in utilities out of the box.

• browse
  • As @ches mentioned in source and browse utilities broken out of the box by no PPrinter #1254, browse takes implicit pprint.PPrinter that is not in the REPL scope by default.
  • fixed by giving a default argument 05e2958
• source
  • define browseSourceCommand that is called from macro (looks like forgotten to port in ba57f10)
  • Added repl.codeColorsImplicit to predefImport, (is this ok?)
  • Add pprint.PPrinter as default parameters (in a wired way)
    • default argument doesn't work for macro definition
    • import implicit pprint.PPrinter to REPL scope may change the behavior of other commands (like grep, browse) because they also receive implicit pprint.PPrinter (but it would be better to use different printer instance?)

[alexarchambault]

Nice!

I wonder if we don't miss some implicit PPrinter somewhere… These used to work fine IIRC. I might have messed with the implicit PPrinter instance that should have been implicitly available in the session. But that can always be fixed later I guess.

[scalway]

EDIT: Yea... It is already merged and I missed that for some reason :).

None of this versions works in my system (intel/ubuntu 22.04.1 LTS):

$ scala-cli repl --ammonite-version 2.4.0 --ammonite --scala 2.13.5
...
$ scala-cli repl --ammonite-version 2.5.1 --ammonite --scala 2.13.7
...
$ scala-cli repl --ammonite-version 2.5.4 --ammonite --scala 2.13.8
Welcome to the Ammonite Repl 2.5.4 (Scala 2.13.8 Java 11.0.16)
@ source(scala.collection.mutable.Buffer) 
cmd0.sc:1: could not find implicit value for parameter pprinter: pprint.PPrinter
val res0 = source(scala.collection.mutable.Buffer)
                 ^
Compilation Failed

This works like expected:

~$ scala-cli repl --ammonite-version 2.3.8 --ammonite --scala 2.13.5
Welcome to the Ammonite Repl 2.3.8 (Scala 2.13.3 Java 11.0.16)
@ source(scala.collection.mutable.Buffer)
//shows it as expected

And this also works:

~$ scala-cli repl --ammonite-version 2.5.4-26-9cd15abe --ammonite --scala 2.13.8
Welcome to the Ammonite Repl 2.3.8 (Scala 2.13.3 Java 11.0.16)
@ source(scala.collection.mutable.Buffer)
//shows it as expected

btw: It is pleasure to use scala-cli in such cases :).

[tanishiking]

This change isn't included in 2.5.4, will be available in the next release (or the latest build as you tested 👍)