make & update `search` component

[serapath]

@todo

• make search component
• smartcontract.codes#11 - advanced search
• show options on search bar similar to how google does it
  • search code (contract DAO (...)
  • search by addresses (0x323094803)
  • search by keywords (deployed contract, open Zeppelin)
  • search only audited
  • search only curated (open Zeppelin i.e.)
  • search only solidity version 0.4.0 and newer
• show search params in URL
• add autocomplete
• add suggest additional keywords (like Pinterest, Google image search)
• add features filtering options
• adapt syntax highlight to our theme (use code mirror, not highlight.js)

---

Inspiration

• IBM SEARCH - see also search tip
• Skyscanner search - search progress bar
• Behance dropdowns of options - filters
• NerdyData search - code results