Add more languages to search suggestions

Created by: attfarhan

Fixes https://github.com/sourcegraph/sourcegraph/issues/8921.

Any language listed in https://github.com/src-d/enry/blob/master/data/extension.go#L1124 is valid, which is a long, long list, so I'm adding the ones that were mentioned in the issue. If there are other major ones feel free to add on to this PR.

These languages weren't included by default because they didn't have icons. I set the default icon to be the WebIcon, but happy to take suggestions here cc @imtommyroberts: