Struct reading and disassembly script overhaul, various misc. loading fixes, bump to .NET 9 (#13)

* Bump projects to .net 9 and update nugets

* add VersionedSerialization + source generator

* migrate versioning to StructVersion class, add handling/detection for 29.2/31.2

* add new struct definitions

* rename serialization methods and add BinaryObjectStreamReader for interop

* Rework metadata struct loading to use new struct versioning

* move 29/31.1/.2 to use tags (-2022,-2023) instead of minor versions

* fix metadata usage validity checks

* rework code registration offsetting a bit and add second 29/31.1 condition

* tweak .1 condition (again)

* 29/31.2 was a psyop

* also remove 29.2 from the readme

* remove loading of packed dlls - this was a very unsafe feature

* support auto-recovering type indices from type handles
fixes loading of memory-dumped v29+ libraries since those replacee their class indices on load with a pointer to the corresponding type

* support loading PEs without an export table

* also read UnresolvedVirtualCallCount on regular v31

* Disable plugin loading for now

* Overhaul disassembler script + add Binary Ninja target (#12)

* Overhaul diassembler scripts:
- No longer defines top level functions
- Split into three classes: StatusHandler (like before), DisassemblerInterface (for interfacing with the used program API), ScriptContext (for definiting general functions that use the disassembler interface)
- Add type annotations to all class methods and remove 2.7 compatibility stuff (Ghidra now supports Python 3 so this is unnecessary anymore)
- Disassembler backends are now responsible for launching metadata/script processing, to better support disassembler differences
- String handling is back in the base ScriptContext class, disassembler interfaces opt into the fake string segment creation and fall back to the old method if it isn't supported

* Add Binary Ninja disassembler script backend
This uses the new backend-controlled execution to launch metadata processing on a background thread to keep the ui responsive

* make binary ninja script use own _BINARYNINJA_ define and add define helpers to header

* Update README to account for new script and binary ninja backend

* implement fake string segment functions for binary ninja but don't advertise support

* also cache API function types in binary ninja backend

* fix ida script and disable folders again

* Fix metadata usage issues caused by it being a value type now

* make TryMapVATR overrideable and implement it for ELFs

* Make field offset reading use TryMapVATR to reduce exceptions

* Fix NRE in Assembly ctor on < v24.2

* Update actions workflow to produce cross-platform CLI binaries, update readme to reflect .net 9 changes

* workflow: only restore packages for projects that are being built

* workflow: tweak caching and fix gui compilation

* workflow: remove double .zip in CLI artifact name

* 29/31.2 don't actually exist, this logic is not needed

Il2CppInspector.Common/IL2CPP/MetadataUsage.cs

@@ -6,6 +6,8 @@
     All rights reserved.
 */
 
+using Il2CppInspector.Next;
+
 namespace Il2CppInspector
 {
     public enum MetadataUsageType
@@ -19,11 +21,13 @@ namespace Il2CppInspector
         FieldRva = 7
     }
 
-    public class MetadataUsage
+    public record struct MetadataUsage
     {
         public MetadataUsageType Type { get; }
         public int SourceIndex { get; }
-        public ulong VirtualAddress { get; private set; }
+        public ulong VirtualAddress { get; }
+
+        public readonly bool IsValid => Type != 0;
 
         public MetadataUsage(MetadataUsageType type, int sourceIndex, ulong virtualAddress = 0) {
             Type = type;
@@ -34,10 +38,10 @@ namespace Il2CppInspector
         public static MetadataUsage FromEncodedIndex(Il2CppInspector package, uint encodedIndex, ulong virtualAddress = 0) {
             uint index;
             MetadataUsageType usageType;
-            if (package.Version < 19) {
+            if (package.Version < MetadataVersions.V190) {
                 /* These encoded indices appear only in vtables, and are decoded by IsGenericMethodIndex/GetDecodedMethodIndex */
                 var isGeneric = encodedIndex & 0x80000000;
-                index = package.Binary.VTableMethodReferences[encodedIndex & 0x7FFFFFFF];
+                index = package.Binary.VTableMethodReferences[(int)(encodedIndex & 0x7FFFFFFF)];
                 usageType = (isGeneric != 0) ? MetadataUsageType.MethodRef : MetadataUsageType.MethodDef;
             } else {
                 /* These encoded indices appear in metadata usages, and are decoded by GetEncodedIndexType/GetDecodedMethodIndex */
@@ -46,12 +50,10 @@ namespace Il2CppInspector
                 index = encodedIndex & 0x1FFFFFFF;
 
                 // From v27 the bottom bit is set to indicate the usage token hasn't been replaced with a pointer at runtime yet
-                if (package.Version >= 27)
+                if (package.Version >= MetadataVersions.V270)
                     index >>= 1;
             }
             return new MetadataUsage(usageType, (int)index, virtualAddress);
         }
-
-        public void SetAddress(ulong virtualAddress) => VirtualAddress = virtualAddress;
     }
 }