message: Update CODEOWNERS to avoid project files being owned by just one person
  Only exception: CI files, as no-one apart from is currently modifying them anyway
diff: @@ -21,8 +21,7 @@ Cargo.toml
  /tools/build-performance/ @kazcw @mwu-tow @wdanilo
  # Scala Libraries
  -/lib/scala/ @4e6
  -/lib/scala/interpreter-dsl/ @4e6 @jaroslavtulach
  +/lib/scala/ @4e6 @jaroslavtulach @hubertp
  # GUI
  /app/gui/ @MichaelMauderer @wdanilo @farmaazon @mwu-tow
  @@ -32,16 +31,13 @@ Cargo.toml
  # Engine (old)
  # This section should be removed once the engine moves to /app/engine
  /build.sbt @4e6 @jaroslavtulach @hubertp
  -/distribution/ @4e6
  +/distribution/ @4e6 @jdunkerley @radeusgd
  /engine/ @4e6 @jaroslavtulach @hubertp
  /project/ @4e6 @jaroslavtulach @hubertp
  /test/ @jdunkerley @radeusgd
  -/tools/ @4e6
  +/tools/ @4e6 @jaroslavtulach @radeusgd
  # Enso Libraries
  # This section should be amended once the engine moves to /app/engine
  /distribution/lib/ @jdunkerley @radeusgd
  /std-bits/ @jdunkerley @radeusgd
  -
  -# Engine
  -/app/engine/ @4e6
  