Code search turned code checker

Created by: rvantonder

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Notes to self:

Before publishing:

• page visit should trigger https://github.com/sourcegraph/sourcegraph/pull/14437
• encodeURIComponent https://github.com/sourcegraph/sourcegraph/pull/14394
• clicking back should restore previous history https://github.com/sourcegraph/sourcegraph/pull/14478
• deny count:1000 page visit should trigger https://github.com/sourcegraph/sourcegraph/pull/14478
• index all repos in go-gh-100
• Two bugs:

if strings.HasPrefix(:[str.], :[prefix.]) {
  :[str.] = :[str.][len(:[prefix]):]
} :[~else]

doesn't work

and

simple select

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Nice to haves:

• Layout improvement (maybe 5/12 editor, 7/12 results)
• comments in editor https://github.com/sourcegraph/sourcegraph/pull/14476
• cmd+enter https://github.com/sourcegraph/sourcegraph/pull/14508
• -bound-count comby
• hover info for query
• toml config file for rewriting