Bug 32030: I18N rewrite

Bug 32030: I18N rewrite

The previous implementation was using vue-i18n inject localized strings
into the Vue app. However it was using json files, and we needed
additional overhead to convert from/to PO files.

I've also tried vue3-gettext that use PO, but the overhead to work with
our workflow was existent as well (see branch joubu/vue3-gettext).

vue-i18n-extract was using for extracting, and a specific misc script
(misc/translate_json.pl) was also used to generate the json file. They
can be removed.

Here we are simply reusing our existing workflow, and we will improve it
(ie. make it more vue-ish) later if we need it.

Signed-off-by: Jonathan Field <jonathan.field@ptfs-europe.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>