Begin the Yelp Leads OAuth flow — returns the Yelp authorize URL

Request

• Base URL
  https://api.optimyzee.com (the document declares no server; this is the origin it was published from)
• Auth
  none declared
• TypeScript
  https://skmtc.dev/optimyzee/apis/optimyzee-api/docs/app/yelp/leads/oauth/start/post.ts

  A function with typed inputs. Its response is checked against the schema.