Wire comparator CLI, marionette threading model, and final load order.

Initialize SmoThreadingModelDesc from marionette before body startup, load
comparator libs before stimbuff via -c/--comparator-lib, and drop the hardcoded
libcomparatorCore.so load path.

Co-authored-by: Cursor <cursoragent@cursor.com>

smocore/include/opts.h

@@ -41,6 +41,7 @@ public:
     std::string argv0;
     std::vector<std::string> senseApiLibPath;
     std::vector<std::string> senseApiLibs;
+    std::vector<std::string> comparatorLibs;
     std::string dapSpecs;
     std::vector<std::string> dapSpecFiles;
     bool verbose, printUsage, traceCallables;