Add expansion DBC CSVs, Turtle support, and server-specific login

tools/asset_extract/extractor.hpp

@@ -16,9 +16,15 @@ public:
     struct Options {
         std::string mpqDir;       // Path to WoW Data directory
         std::string outputDir;    // Output directory for extracted assets
+        std::string expansion;    // "classic", "tbc", "wotlk", or "" for auto-detect
+        std::string locale;       // "enUS", "deDE", etc., or "" for auto-detect
         int threads = 0;          // 0 = auto-detect
         bool verify = false;      // CRC32 verify after extraction
         bool verbose = false;     // Verbose logging
+        bool generateDbcCsv = false; // Convert selected DBFilesClient/*.dbc to CSV for committing
+        bool skipDbcExtraction = false; // Extract visual assets only (recommended when CSV DBCs are in repo)
+        bool onlyUsedDbcs = false; // Extract only the DBC files wowee uses (implies DBFilesClient/*.dbc filter)
+        std::string dbcCsvOutputDir; // When set, write CSVs into this directory instead of outputDir/expansions/<exp>/db
     };
 
     struct Stats {
@@ -28,6 +34,18 @@ public:
         std::atomic<uint64_t> filesFailed{0};
     };
 
+    /**
+     * Auto-detect expansion from files in mpqDir.
+     * @return "classic", "tbc", "wotlk", or "" if unknown
+     */
+    static std::string detectExpansion(const std::string& mpqDir);
+
+    /**
+     * Auto-detect locale by scanning for locale subdirectories.
+     * @return locale string like "enUS", or "" if none found
+     */
+    static std::string detectLocale(const std::string& mpqDir);
+
     /**
      * Run the extraction pipeline
      * @return true on success