DOP-5134: Language selector

[mmeigs]

Stories/Links:

DOP-5134

Notes:

Adds Language selector to UnifiedNav in redoc OpenAPI pages.

Sadly the consistent-nav does not export their types therefore we have a couple instances of git-ignore 😞
I tried to create mirrored types, but also oddly consistent-nav right now does not include ja-jp as a valid language. 😱

Most of this code is copied/slightly altered from Snooty's locale.js file.

Preprd example of it working!!

To build

To build locally and review, here are helpful steps:

---

Ensure Artifactory credentials are set up and set to NPM_BASE_64_AUTH and NPM_EMAIL env variables. This should be similar to the setup on Snooty. Below are the instructions to work with Redoc locally with custom MongoDB components, such as the Consistent Nav:

1. checkout branch DOP-5133 in git
2. In redoc/root folder of this fork, run npm install.
3. In redoc/cli folder, run npm install.
4. In redoc/cli folder, run: npm link ../ ../node_modules/react/ ../node_modules/styled-components/. This will link certain CLI dependencies to be compatible with the local instance and fork of Redoc.
5. In redoc/root folder, run: npm run bundle. This will create bundled files needed by the CLI / needed to run the CLI.
6. Run the following command to see a full example built into a local file called redoc-static.html in your root directory.

node cli/index.js build https://mongodb-mms-prod-build-server.s3.amazonaws.com/openapi/7f44860f3d20f152e7f187fe498a104aa7a9e3ba.json  --options options.json

7. Once built, use your browser to view the static html by putting the path to that file in your browser as a url

[rayangler]

Works great on the pre-prod site! Just a few non-blocking nits just for the purpose of cleaning up