Include metadata fields in schema

[LionDoge]

This change includes metadata names and values in dumps for classes, enums, and fields. They can also contain interesting information to compare against in game updates. Metadata can have different value types, I only handle the primitive ones, as there could be more - such as ones that use custom data structures which could also change between engine revisions (e.g Pulse system bindings). These fields get put in comment format above the corresponding definition.

Metadata names that include some value are defined in a separate file as array of values that gets looked up when dumping. This list might not be exhaustive, and it also might change between engine revisions, but probably not that commonly.

Sample output:

// MGetKV3ClassDefaults
class C_INIT_InitialVelocityNoise : public CParticleFunctionInitializer
{
	// MPropertyFriendlyName = "absolute value"
	// MVectorIsCoordinate
	Vector m_vecAbsVal;
	// MPropertyFriendlyName = "invert abs value"
	// MVectorIsCoordinate
	Vector m_vecAbsValInv;
	// MPropertyFriendlyName = "spatial coordinate offset"
	// MVectorIsCoordinate
	CPerParticleVecInput m_vecOffsetLoc;
	// MPropertyFriendlyName = "time coordinate offset"
	CPerParticleFloatInput m_flOffset;
	// MPropertyFriendlyName = "output minimum"
	CPerParticleVecInput m_vecOutputMin;
	// MPropertyFriendlyName = "output maximum"
	CPerParticleVecInput m_vecOutputMax;
	// MPropertyFriendlyName = "time noise coordinate scale"
	CPerParticleFloatInput m_flNoiseScale;
	// MPropertyFriendlyName = "spatial noise coordinate scale"
	CPerParticleFloatInput m_flNoiseScaleLoc;
	// MPropertyFriendlyName = "input local space velocity (optional)"
	// MParticleInputOptional
	CParticleTransformInput m_TransformInput;
	// MPropertyFriendlyName = "ignore delta time"
	bool m_bIgnoreDt;
};

Note 1: I used compile time string hash (FNV1a) for efficient comparison when looking up metadata entries.
Note 2: Some more printable fields could be added (e.g for MNetworkVarNames that uses a compound value with a name and value) I think this could differ a bit between engines, so I didn't touch it yet, but we could still do a commit for that.

[Poggicek]

Looks good, since you took the list from source2gen you need to comply with their apache license, please add their license to the NOTICE file and that will do.

[xPaw]

Dupe

[Poggicek]

I believe this is way too overengineered, we do not care about few ms of performance, but do care about the code readibility. I am for using std map with std strings that will get hashed in std lib itself and map it to an enum of the different type values. Then resolve those enums in a switch case to the proper string value.

[Poggicek]

I will do the changes and merge it in, no need to resolve these