Add Swiftype to IPFS Docs

[johnnymatthews]

Recently, Algolia search stopped working within IPFS Docs. This PR https://github.com/ipfs/ipfs-docs/pull/1489 switched the site back to using the default VuePress search. While the VuePress search does a decent enough job, it'd be great to add IPFS Docs into the Protocol Labs Swiftype account so that we can better tailor the results that users get.

Tasks

• [x] Add IPFS Docs to Swiftype account.
• [x] Index the site.
• [x] Add Swiftype JS content into this repo.
• [x] Test test test:
  • [x] I suggest we spin up a beta/test build for a week and see if we notice any bugs or weird things going on there.
• [ ] Merge.

[johnnymatthews]

Had issues applying a custom class into the navbar with VuePress. VuePress uses an external plugin to show a search, but there isn't an documentation on how to customize this plugin with the class that Swiftype needs to insert it's logic into a site.

I've got Swiftype suggestions showing up properly:

And then the user can view the full suggestions by pressing enter:

However, these changes only exist locally because I had to manually edit files within the node_modules directory. I'm still trying to find a way to either export and use the plugin within the repo, or find a way to edit the plugin-sourced-searchbar using the config.