build system updates and other fixes

add preset config
import qt
separate core and frontend

src/core/importer.h

@@ -51,9 +51,6 @@ struct Config {
     std::string safe_mode_firm_path; ///< Path to safe mode firm (A folder) (Sysdata 1)
     std::string seed_db_path;        ///< Path to seeddb.bin (Sysdata 2)
     std::string secret_sector_path;  ///< Path to secret sector (New3DS only) (Sysdata 3)
-
-    // Whether this config has all necessary information
-    bool is_good;
 };
 
 class SDMCImporter {
@@ -96,3 +93,9 @@ private:
     Config config;
     std::unique_ptr<SDMCDecryptor> decryptor;
 };
+
+/**
+ * Look for and load preset config for a SD card mounted at mount_point.
+ * @return a list of preset config available. can be empty
+ */
+std::vector<Config> LoadPresetConfig(std::string mount_point);