add automatic triggering of review requests with a code owners file

# This file contains file patterns that triggers automatic

# code review requests from users that are owners of these files

# Order matters, the last match has the highest precedence

# library folders

lib/colvars/*         @giacomofiorin

lib/compress/*        @akohlmey

lib/kokkos/*          @stanmoore1

lib/molfile/*         @akohlmey

lib/qmmm/*            @akohlmey

lib/vtk/*             @rbberger

# packages

src/KOKKOS            @stanmoore1

src/USER-CGSDK        @akohlmey

src/USER-COLVARS      @giacomofiorin

src/USER-OMP          @akohlmey

src/USER-QMMM         @akohlmey

# tools

tools/msi2lmp/*       @akohlmey