Adding support for hybrid search.

[petyaslavova]

Pull Request check-list

Please make sure to review and check all of these items:

• Do tests and lints pass with this change?
• Do the CI tests pass with this change (enable it first in your forked repo and wait for the github action build to finish)?
• Is the new or changed code fully tested?
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?
• Is there an example added to the examples folder (if applicable)?

NOTE: these things are not required to open a PR and can be done
afterwards / while the PR is open.

Description of change

Please provide a description of the change here.

[Copilot]

Pull Request Overview

This PR adds support for hybrid search functionality to the Redis search client, enabling combined text and vector similarity searches. The implementation introduces new query types, result parsers, and comprehensive test coverage.

Key changes:

• New hybrid query classes for combining text search and vector similarity operations
• Hybrid search command execution and result parsing
• Post-processing configuration for filtering, sorting, and aggregating results

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/test_search.py	Comprehensive test suite covering hybrid search functionality including various query types, filters, and post-processing options
redis/connection.py	Minor whitespace cleanup (removed blank line)
redis/commands/search/hybrid_query.py	New file implementing hybrid query classes and post-processing configuration
redis/commands/search/commands.py	Added hybrid_search method and result parsing logic
redis/commands/search/init.py	Registered hybrid search command parser

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

Corrected spelling of 'posprocessing_config' to 'postprocessing_config'.