feat: publish Dever core with project scaffolding and versioned AI skills

test/native-runtime-abi/log-driver.c

@@ -0,0 +1,8 @@
+#include "runtime.h"
+
+/* Link with managed-driver.c: the first flush initializes the logger; every
+ * later flush must finish without outstanding per-call or deferred owners. */
+int dever_test_run(void) {
+    dever_rt_v1_log_flush();
+    return 0;
+}