* vectorize: add more pricing examples

* vectorize: fix formatting

* add langchain link:

* Apply suggestions from code review

Co-authored-by: Maddy <130055405+Maddy-Cloudflare@users.noreply.github.com>

* fix pricing sentence

* Apply suggestions from code review

Co-authored-by: Maddy <130055405+Maddy-Cloudflare@users.noreply.github.com>

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Co-authored-by: Maddy <130055405+Maddy-Cloudflare@users.noreply.github.com>