Support Multilingual: Read multiple languages from request parameter

[syphax-bouazzouni]

Context

Follow up of #63

Currently, we don't use the lang attribute of literals, i.e in source data, we have skos:prefLabel "test"@en but we show only "test" if we want to show multiple languages the language information needs to be used and be complainant with what JSON-LD specify

The plan would is to be fully compliant JSON-LD and show the following in our API endpoints

Requirements

• Feature: Support multilingual - Add read multiple language goo#32
• Feature: return requested languages in @language - part 2 - multiple langugaes #80

[syphax-bouazzouni]

Hi @haddadzineddine concerning this task we have two issues to fix:

1. This path: https://data.testportal.lirmm.fr/ontologies/INRAETHES?display=all; does no more work
2. The properties need to show also the corresponding languages of each value

[syphax-bouazzouni]

Deployed in production ontoportal-lirmm/bioportal_web_ui#240