#51 Add translation utilities to devtools

[Henk van den Akker]

Start a feature request under https://github.com/freeplane/addons/issues

Formulate the specifications based on my own inline scripts and on Gergely Papp's fork https://github.com/gpapp/freeplane-devtools.

Better discuss with Edo Fro his application of devtools with Papp's alterations: https://github.com/EdoFro/freeplane-devtools/discussions.