Add Conan profile to repo

You may have to specify a newer version of CMake for Conan to properly recognize Visual Studio 2026.

`C:\Users\halflifefan\.conan2\profiles\default`
```
[settings]
arch=x86_64
build_type=Release
compiler=msvc
compiler.cppstd=23
compiler.runtime=dynamic
compiler.version=195
os=Windows

[tool_requires]
cmake/4.2.1
```