Implement search function

[Wendrowiec13]

Resolves L2B-986

[torztomasz]

I think changing the search bar placeholder should also be a part of this PR

[torztomasz]

I approved by mistake

[Wendrowiec13]

I think changing the search bar placeholder should also be a part of this PR

Agreed

[linear]

L2B-986 Implement SearchBox functionality

We don't want to have a search results page and searching should go directly to the result or show not-found page.

The placeholder on the search bar should read:

Search by Ethereum address, Stark key, state-update-id or #vault-id

(where vault-id should read position-id if on perpetual).

Users should be able to search for:

• StarkKey → goes to User Page
• Ethereum Address → goes to User Page
• Position/Vault Id → goes to User Page
• State Update Id → goes to State Update Details
• State Update hash → goes to State Update Details

Implementation details

Don't use preprocessed_* tables, unless there's no other way - but then discuss with adrian.adamiak

Acceptance Criteria

• the search is case insensitive