* the front-end now use global constants, based on the translation key
* build-client.js use the ESBuild "define" directive to replace these
globals at compile time, by the english value
* build:client must now be called after build:languages
* moving the loadLoc and loc backend functions in a separate lib
* new option to allow external xmpp account s2s connections
* settings to setup the port and network interfaces
* documentation WIP
Related to issue #114
Implementing a new translating system, so we can more easily translate
settings strings. Indeed, these strings are difficult to embed in
JSON format.
We still use JSON files for standard strings, but in addition we have
dedicated YAML files to translate settings strings.
There is a new build-languages.js script that merge all translations in JSON files.
Other modifications:
* Eslint: ignoring documentation and build scripts.
* french settings translations.
From now on, webchat can only be activated for local videos.
It will never be displayed on remote videos.
This is because an incompatibility with a new feature (webchat per channel).
Moreover this feature was very limited: the webchat was not shared with the remote instance (this will probably be achieved in a future release).
