Autocomplete i18n 7.x

[shawnbot]

This patches the 7.x tree with most of the changes in #170 so that autocomplete components can be translated without having to get us onto 8.0 (#164).

I'm also updating the translation docs and adding a new page for the autocomplete component. 📝 🚀

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[github-actions[bot]]

Size Change: +522 B (+1%)

Total Size: 89.3 kB

Filename	Size	Change
dist/formio-sfds.standalone.js	69.5 kB	+522 B (+1%)

ℹ️ View Unchanged

| Filename | Size | Change | | :--- | :---: | :---: | | `dist/common.css` | 332 B | 0 B | | `dist/formio-sfds.css` | 14 kB | 0 B | | `dist/portal.js` | 5.36 kB | 0 B |

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