1. What this PR does / why we need it:

This PR resolves issue #6429 by extending the enable_feature_view,
disable_feature_view, and set_feature_view_state operations to support all
feature view types, specifically adding support for StreamFeatureView. It also
exposes these actions through new REST and gRPC API endpoints for external
clients.

2. Changes:

• gRPC Server: Added EnableFeatureView, DisableFeatureView, and
  SetFeatureViewState handlers in RegistryServer to enable operations from
  gRPC clients.

• REST API Router: Added FastAPI routes (/feature_views/{name}/enable,
  /disable, /state) delegating requests to the gRPC client.

• Core FeatureStore: Enhanced client validation in feature_store.py to
  support StreamFeatureView type validation and raise clean ValueError
  exceptions for unsupported resource types (like Entities).

• CLI Groups: Added enable, disable, and set-state subcommands to
  on-demand-feature-views and stream-feature-views Click command groups.

• Protos: Compiled updated proto interfaces in RegistryServer.proto.

  Which issue(s) this PR fixes:

  Fixes Extend enable/disable/set-state to all feature view types and REST/gRPC APIs #6429

  Checks

  • I've made sure the tests are passing.
  • My commits are signed off (git commit -s)
  • My PR title follows [conventional commits](https://www.
    conventionalcommits.org/) format

  Testing Strategy

  • Unit tests
  • Integration tests

  Testing details:

  Executed the unit tests and REST API integration tests:

  uv run python -m pytest sdk/python/tests/unit/test_feature_view_state.py
  sdk/python/tests/unit/api/test_api_rest_registry.py
  
  Results: All  101 passed  successfully in 33.48 seconds.