Add functions to get the process name and main module range

[mitchell-merry]

This is something I needed to access for my scene manager stuff (need to access the range of the main module without changing the API of SceneManager::attach.

I imagine it could be useful elsewhere too.

I'm inferring the name of the main module is the same as the name of the process - I think this is a safe assumption, but let me know if not.

[Jujstme]

Two quick observations:

1. You are allocating a string, requiring those functions to be hidden behind a #[cfg(feature = "alloc")], however you can probably use anArrayCString instead.
2. If I remember correctly, despite the fixes pushed by Cryze recently on the runtime, Process::get_path() can still fail if the process is inside special directories.

[mitchell-merry]

Two quick observations:

1. You are allocating a string, requiring those functions to be hidden behind a #[cfg(feature = "alloc")], however you can probably use anArrayCString instead.
2. If I remember correctly, despite the fixes pushed by Cryze recently on the runtime, Process::get_path() can still fail if the process is inside special directories.

1. Yeah, but I'm calling get_path anyways which already allocates a string, so I don't think there's a way around it. Besides, I don't find ArrayCStrings very practical to use, I almost always want a string (if there's a way around it, I'm happy to introduce a get_name_as_string version instead)

2. Special directories, as in network drives? Seems like something that needs to be fixed separately still and not something I need to consider here - my first choice would have been to store the process name on the type itself so we don't need to re-calculate it, but Process is not a struct.