[ryanbromati]

Fixes #1347

Description of the Change

Fixes the four broken examples in docs/usage.md:

• import SearchFilter from rest_framework.filters instead of rest_framework;
• import ModelViewSet in the filtering example;
• correct descriptuon to description in filterset_fields;
• remove the trailing ) in the manual-output example, import Response, and return Response(data).

Also adds my name to AUTHORS.

Tests

• PYTHONPATH=. pytest -q → 391 passed
• flake8 → clean
• black --check . → clean
• both Python blocks extracted from docs/usage.md compile

This PR is intentionally docs-only. I can add a doctest/CI check to keep the examples runnable if you'd prefer that here.

Checklist

• PR only contains one change (docs fix + AUTHORS)
• unit-test added (docs-only)
• documentation updated
• CHANGELOG.md updated (not user-relevant)
• author name in AUTHORS

[sliverc]

LGTM