Extract resource handling to UnityResource
Add API header resource helpers
Fix UnityVersion ToString() when Min == Max
Replace fixed list of Il2Cpp header reserved names with parsed names from actual selected headers (solves TypeInfo/MemberInfo problems in 5.3.0-5.3.4 (metadata v16-20))
Use CppDeclarationGenerator when initializing CppTypeCollection to ensure all Il2Cpp header symbols are reserved
Process API headers in CppTypeCollection.FromUnityHeaders
Move #define IS_32BIT handling to UnityHeaders
Update tests
We prefer to have the Outputs directory contain just one file or
namespace per output module, so we'll move all C++-related stuff to a
new CppUtils namespace instead.
We want to get types into the IDA output, and to do that we need
accurate types for the Il2Cpp structures. Unfortunately, some crucial
types like Il2CppClass change between versions without any corresponding
metadata changes, meaning that we have to manually identify the version
outside of the Inspector somehow (e.g. by looking at the version number
embedded in Unity asset files). This patch adds header files for *every*
known Unity version from 5.3.0 to 2019.3.8, merging them into version
ranges where header files don't change.
It also adds front-end support for supplying the version number in both
the CLI and GUI. The GUI is given the ability to guess the version
number approximately to reduce the number of choices presented to the
user.
