Update client for v28 changes

[tharropoulos]

Change Summary

This pull request includes significant updates to the Typesense API, including new features, schema modifications, and documentation updates. The most important changes are the addition of stemming dictionary support, new query parameters, and updates to the API version and documentation links.

New Features:

• Added support for stemming dictionaries, including endpoints to list, retrieve, and import stemming dictionaries. (typesense/api/generator/generator.yml, typesense/api/generator/openapi.yml) [1] [2] [3] [4]

Schema Modifications:

• Introduced new fields such as stem_dictionary, symbols_to_index, token_separators, and max_filter_by_candidates to the schema. (typesense/api/generator/generator.yml) [1] [2]
• Added SchemaChangeStatus object to track schema change operations. (typesense/api/generator/generator.yml, typesense/api/generator/openapi.yml) [1] [2]

New Query Parameters:

• Added truncate and max_filter_by_candidates query parameters to various endpoints. (typesense/api/generator/generator.yml, typesense/api/generator/openapi.yml) [1] [2] [3] [4]

API Version Update:

• Updated API version from 27.0 to 28.0. (typesense/api/generator/generator.yml, typesense/api/generator/openapi.yml) [1] [2]

Documentation Updates:

• Updated external documentation links to reflect the new API version 28.0. (typesense/api/generator/generator.yml, typesense/api/generator/openapi.yml) [1] [2] [3] [4]

PR Checklist

• I have read and signed the Contributor License Agreement.