feat: Add string types

[Zffu]

Add the following types:

• cstring: Represents a char pointer that must end with \0
• staticstr: Represents a static defined string. Any string primitive that is hard coded will instantly be a staticstr to allow for performance
• anystr: Represents any type of primitive string (either a cstring or a staticstring)
• std:strings:lenstr: Represents a struct that contains a size and a null terminated string

The following should be classified as primitives and shadow function compatible:

• cstring
• staticstr
• anystr

Furthermore, cstring can be passed as a ptr due to it's pointer nature.