[WIP] Add locales folder for enabling translations

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

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This section details on the original issue you should resolve

<issue_title>locales folder</issue_title>
<issue_description>Please add a locales folder to enable translations.

Thank you</issue_description>

Comments on the Issue (you are @copilot in this section)

@JohnMcLear This is harder than I expected. The translations apply to the title / hover but they aren't applying to the text content in the file menu... :( @JohnMcLear Yea that's what I'm doing but sometimes it doesn't apply.. I will push an example and if you want you can complete it? @JohnMcLear https://github.com/JohnMcLear/ep_file_menu_toolbar/commit/5dfdb2c8dd25f0b50b6909671f47aafaffe50f3f

Ref above, I did a handful but the rest need doing .

Ref to https://github.com/ether/etherpad-lite/blob/develop/src/locales/en.json for string IDs</comment_new>
<comment_new>@JohnMcLear
@woeterman94 do you think you can finish the rest up please?

@JohnMcLear Exactly 👍