Rebalance and link fuzzy metadata search docs

[cjcenizal]

A couple ideas:

• On https://docs.vectara.com/docs/search-and-retrieval/fuzzy-metadata-search, we need to provide a link to the API reference https://docs.vectara.com/docs/rest-api/query-metadata
• Some of the content on the long-form docs would be more helpful on the API reference. For example, all of the syntax reference material. The long-form docs should focus on the concepts and use cases.