chore: cleanup lancedb related wording and update operation tags

[jackye1995]

1. remove lancedb related wording and sections from the doc and code, should move to lancedb/documentation
2. use | instead of > to display the OpenAPI spec better in swagger UI
3. add Table in the name of table operations
4. add tags Namespace, Table, Metadata, Data to annotate the APIs
5. add newly imported lancedb operations to the docs, update rules about request and response
6. align the namespace APIs with LanceDB imported APIs by removing the head API responses and rename /v1/table/{id}/list to /v1/namespace/{id}/list_tables
7. Clarify /v1/namespace/{id}/create should use parent namepace ID in URI route
8. update Java examples accordingly the changes