Bed 5498: Move node search component to bh-shared-ui

[maffkipp]

Description

Migrates NodeSearch component into the bh-shared-ui project.

Also deletes the 1mb gif for the easter egg that we are no longer using.

Motivation and Context

This PR addresses: BED-5498

This prepares us to swap in ExploreSearchV2 in BHE and enable deep linking on the explore page.

How Has This Been Tested?

This is mostly just renaming a file and shuffling imports. All existing tests pass, affected components still work as expected

Screenshots (optional):

Types of changes

• Chore (a change that does not modify the application functionality)

Checklist:

• I have met the contributing prerequisites
  • Assigned myself to this PR
  • Added the appropriate labels
  • Associated an issue: Issues and Pull Requests README #672
  • Read the Contributing guide: https://github.com/SpecterOps/BloodHound/wiki/Contributing
• I have ensured that related documentation is up-to-date
  • Open API docs
  • Code comments (GoDocs / JSDocs)
• I have followed proper test practices
  • Added/updated tests to cover my changes
  • All new and existing tests passed