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

test/dever-cli-tests/support/compiler_sleeper.c

@@ -0,0 +1,18 @@
+/* Native author fixture for compile cancellation and deadline supervision. */
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+int main(int argc, char **argv) {
+    if (argc == 2 && strcmp(argv[1], "--dever-health") == 0) return 0;
+    FILE *pid = fopen("worker.pid", "w");
+    if (!pid) return 2;
+    if (fprintf(pid, "%ld", (long)getpid()) < 0 || fclose(pid) != 0) return 3;
+    struct timespec remaining = {300, 0};
+    while (nanosleep(&remaining, &remaining) != 0) {
+        if (errno != EINTR) return 4;
+    }
+    return 0;
+}