Disk Cache initial implementation

Serializes code blocks to disk - only blocks coming from known regions, for now

Disabled by default, key and versioning still needs work, but works for testing

FEXCore/Source/Interface/Config/Config.cpp

@@ -48,6 +48,7 @@ enum Paths {
   PATH_CONFIG_FILE_LOCAL,
   PATH_CONFIG_FILE_GLOBAL,
   PATH_CONFIG_TELEMETRY_FOLDER,
+  PATH_CACHE_DIR,
   PATH_LAST,
 };
 static std::array<fextl::string, Paths::PATH_LAST> Paths;
@@ -64,6 +65,10 @@ void SetConfigFileLocation(const std::string_view Path, bool Global) {
   Paths[PATH_CONFIG_FILE_LOCAL + Global] = Path;
 }
 
+void SetCacheDirectory(const std::string_view Path) {
+  Paths[PATH_CACHE_DIR] = Path;
+}
+
 const fextl::string& GetTelemetryDirectory() {
   auto& Path = Paths[PATH_CONFIG_TELEMETRY_FOLDER];
   if (Path.empty()) {
@@ -91,6 +96,10 @@ const fextl::string& GetConfigFileLocation(bool Global) {
   return Paths[PATH_CONFIG_FILE_LOCAL + Global];
 }
 
+const fextl::string& GetCacheDirectory() {
+  return Paths[PATH_CACHE_DIR];
+}
+
 fextl::string GetApplicationConfig(const std::string_view Program, bool Global) {
   fextl::string ConfigFile = GetConfigDirectory(Global);