#117 part 1: New documentation website (#151)

This commit concerns the first subtask of this issue: https://github.com/JohnXLivingston/peertube-plugin-livechat/issues/117

It provide a brand new documentation website, that replace the previous markdown files.
The website is auto-generated using CI/CD, and can be found here: https://johnxlivingston.github.io/peertube-plugin-livechat/

support/documentation/content/contributing/translate/_index.en.md

@@ -0,0 +1,21 @@
++++
+title="Translate"
+description="Translate the plugin"
+weight=20
+chapter=false
++++
+
+You can help us to translate this PeerTube plugin by creating or modifying translation files in the `languages` folder.
+
+Please work on the `develop` branch, and do your commits and pull request on this branch.
+
+If the language you are interesting in does not exist yet, create a file `code.json` in the `languages` folder, where `code` is the language code.
+The language code must be the same as the Peertube's langage code (see [Peertube documentation](https://github.com/Chocobozzz/PeerTube/blob/develop/support/doc/translation.md)).
+Then add the language file in the `package.json` file, under the key `translations`.
+
+Translation strings are set in the language file as follow:
+
+- files are in [JSON format](https://www.json.org)
+- the JSON key is the english string (see existing keys in the [french translation file](languages/fr.json)).
+- the JSON value is the translating string
+- NB: there is no english translation file (this is how translation works for peertube's plugins)