Test shared-state Actix app builder wiring

- Add shared-state bridge test coverage for default HTML vanilla JS
Actix apps
- Add transport channel and dispatcher tests for Actix renderer
configuration
- Hoist shared-state test imports and fixtures behind feature gates

Force MSVC DLL runtime in Windows CI

- Generate a Windows CMake toolchain file that sets the MSVC runtime to
MultiThreadedDLL
- Override debug C and C++ flags to use /MD with the Ninja generator
- Export the toolchain file before running the build-and-test suite

Merge 0fa56bb into d234b7f

Upgrade compatible Cargo dependencies

Upgrade compatible Cargo dependencies

Normalize markdown code fence languages

- Extract the first token from fenced code block info strings
- Add syntax language alias normalization for common short names
- Use normalized syntax tokens before syntect highlighting
- Cover language alias and modifier parsing with unit tests

Upgrade compatible Cargo dependencies

Document Switchy Actix web server crate

- Add a README for `switchy_web_server_actix`
- Describe the Actix backend role and supported integrations
- Include direct and higher-level Cargo usage examples

Upgrade compatible Cargo dependencies

Upgrade compatible Cargo dependencies