Interactive search in live server

[srid]

In live server, add a search box where users can search notes interactively.

This can be implemented one top of https://github.com/srid/ema/issues/69

• [x] ema.switchRoute
• [ ] ema: support for query in URLs (ie., /search?q=foo+bar)
  • That, or we can get by without queries, ie., /search/foo+bar