(UI) Search users and tournaments

[L-Mario564]

Depends on: #26.

Why?

Any user should be able to search for other users and any published tournaments.

How?

Have a search icon next to the nav bar links, once clicked, a modal will appear where users can input anything. That input must be passed to the tRPC procedure defined to search for users and tournaments (#26) every time the user presses the enter key when focusing on the input or when they hit the search button. The results must be displayed, the user having an anchor that links to their Kyoso profile (/user/[user_id]) and the tournament having one that links to its landing page (/t/[tournament_slug]).