Improve search

[02JanDal]

There are several issues with search currently:

• If there is a perfect match in both name respectively description in two packages both will have the same score, and thus be ordered arbitrarily. This means that a package with "client" somewhere in the description could come before a package called "WebSocket client" for example.
• Searching in tags does not highlight them
• There should a way to explicitly search for keyword, authors, license, repo, etc.
  • Maybe similar to how Github does it (keyword:client license:MIT repo:conan-central)
• Scoring could take additional factors into account, like available package versions, project stats on Github, etc.