Unify symbol table format and implement for Elf and Mach-O

Il2CppInspector.Common/FileFormatReaders/Symbol.cs

@@ -0,0 +1,26 @@
+/*
+    Copyright 2020 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
+
+    All rights reserved.
+*/
+
+namespace Il2CppInspector
+{
+    public enum SymbolType
+    {
+        Function,
+        Name,
+        Import,
+        Unknown
+    }
+
+    // A code file function export
+    public class Symbol
+    {
+        public ulong VirtualAddress { get; set; }
+        public string Name { get; set; }
+        public SymbolType Type { get; set; }
+
+        public string DemangledName => CxxDemangler.CxxDemangler.Demangle(Name);
+    }
+}