Move search api to Worker, and search indexes to R2 #495

Job	Run time
website-preview / deployment	5m 31s
test / unit	4m 4s
lint / lint	1m 57s
e2e / e2e	7m 27s
typescript / typecheck	45s
check-seo / check-seo	3m 57s
storybook-preview / deployment	44s
	24m 25s

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