Stop using C-style casts in new code

[daljit46]

There are several places in our codebase where we are relying on C-style casts instead of using C++ casts. While it's true that writing something like float(value) is shorter and arguably more readable than something like static_cast<float>(value), C-style casts are inherently a worse choice. In particular, there are three benefits of using C++ style casts:

• they're checked at compile time by the compiler (when it's possible to do so).
• they express intent much better than C-style casts.
• they're greppable (very useful when refactoring something).

[Lestropie]

👍 Does clang-tidy catch these / can it autofix?

[daljit46]

Clang-tidy does seem to have a check for this: cppcoreguidelines-pro-type-cstyle-cast, but in my experience it doesn't seem to provide a fixit (even though it should) and it also doesn't diagnose the issue properly in the majority of cases. Although, I probably should test this on various platforms to check whether it's an issue with my configuration.