Temporary fix: Search with google

[philhawksworth]

To help us assess alternatives for a better search experience for visitors with more complete and accurate results, we could direct search requests to a scoped search query on google.

This PR:

• Replaces the Orama search UI with a new search input which directs the query to Google's search
• Removes all Orama CSS, JS, and UI components
• Removes the Orama search index generation tasks from the build
• Removes any other Orama dependencies

Ideally we'll reinstate Orama once this is optimised suitably and includes all the search results we would expect. Or potentially an alternative service

[ry]

This is approved from a strategic perspective, would like @josh-collinsworth's review on code

[josh-collinsworth]

LGTM 👍 Serviceable as a temporary fix.