Begin support for translations

[NullVoxPopuli]

Implementation prompted by: https://github.com/ember-learn/ember-website/issues/901

This will enable users:

• to switch to their preferred language
• help translate to their preferred language
• not need to worry about the technical details of how to setup ember-intl

Non-goals:

• actually do translations for non-english (PRs very welcome for that)

Open for discussion:

• keep everything in git? or lean on something like CrowdIn? (or other translation service?)
  • I think CrowdIn has an embeddable widget to allow folks to translate without interacting with code
    • I can set this up and own it if folks want to see how it works / a demo, etc

Remaining Requirements:

• [ ] need to lessen the barrier to contribution / translation submission (potentially via in-site widget)
• [ ] need to have a way to display when translations are out of date on a specific page (most useful for the guides)
• [ ] need to polish up the language switcher

Developing:

• locally, there will be "missing translation" errors", but in production a fallback of english is configured

Notes on the PR:

• translation switcher needs work, what is in this PR is the bare minimum to demonstrate the functionality
• sample translations are from google translate, so, we'll see if native speakers agree with a machine or not 🙃 (not required for merging, but just demonstration in this PR)

[netlify[bot]]

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[stale[bot]]

This pull request has been automatically marked stale. If this pull request is something that still needs work, please add a comment and it will remain open, otherwise it will close in 7 days. You are welcome to open a new pull request if you miss the window. Thanks!

[NullVoxPopuli]

stalebot is hostile to long-running work. shoo. lol

[stale[bot]]

This pull request has been automatically marked stale. If this pull request is something that still needs work, please add a comment and it will remain open, otherwise it will close in 7 days. You are welcome to open a new pull request if you miss the window. Thanks!

[NullVoxPopuli]

Rude, bot