feat: support multivec maxsim

[kemingy]

cc @xieydd

[Copilot]

Pull Request Overview

This PR adds support for multivec maxsim, introducing new methods to create and query multivec indexes alongside related registry and test updates. Key changes include:

• New methods in the client for creating multivec indexes and querying multivec search.
• Updates to the registry to register multivec columns and search them.
• Additional tests and documentation updates to cover multivec support.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
vechord/client.py	Added create_multivec_index() and query_multivec() methods for multivec.
vechord/registry.py	Integrated multivec index creation and search into registry registration and querying.
tests/test_table.py	Added Sentence table and tests for multivec search functionality.
vechord/spec.py	Added a multivec_column() class method to identify multivec columns.
README.md	Updated features list to include multivec and hybrid search.
tests/test_spec.py	Expanded tests for multivec and keyword column extraction.
docs/source/api.md	Updated API docs to list Keyword as a public member.

[kemingy]

The test needs the latest vchord to support maxsim.

[Copilot]

Pull Request Overview

This pull request introduces support for multivec maxsim by adding multivec index creation and a new search_by_multivec method, updates tests and documentation, and makes minor adjustments to workflows and code style.

• Added multivec index support in the client and registry
• Updated tests to cover multivec queries and limit functionality in select_by
• Revised README badges and API documentation to reflect new features

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
examples/simple.py	Adds a simple example demonstrating multivec search support
README.md	Updates assets and feature list
vechord/client.py	Implements create_multivec_index and updates select and query
tests/test_table.py	Adds tests for multivec maxsim and pipeline functionality
vechord/registry.py	Updates select_by to accept a limit parameter and adds search_by_multivec
.github/workflows/check.yml	Updates workflow configuration with additional paths and image
vechord/spec.py	Adds multivec_column classmethod and updates todict implementation
tests/test_spec.py	Extends tests to verify new multivec and keyword column support
.github/workflows/pages.yml	Adjusts workflow steps for docs and removes unnecessary setup
vechord/service.py	Updates route documentation comments for web app endpoints
examples/web.py	Adds a comment regarding the pipeline usage in the web app
examples/hybrid.py	Updates embedding to GeminiDenseEmbedding and adjusts vector size
docs/source/api.md	Updates API docs to include Keyword in the module members