software/theia: enable color ls in bash

Similar to debian's default /etc/skel
2 jobs for feat/theia-1.34.0 in 0 seconds (queued for 1 second)
Status Job ID Name Coverage
  External
failed SlapOS.SoftwareReleases.IntegrationTest-TestRunner1

06:20:15

canceled SlapOS.SoftwareReleases.IntegrationTest-TestRunner1

05:10:28