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

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

@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <string.h>
+
+extern int command_value(void);
+
+int main(int argc, char **argv) {
+    const unsigned char expected[] = {0, 255, 128, 10};
+    unsigned char input[sizeof(expected)];
+    if (argc != 3 || strcmp(argv[1], "a b") != 0 ||
+        strcmp(argv[2], "$(literal);*") != 0 || command_value() != 42)
+        return 90;
+    if (fread(input, 1, sizeof(input), stdin) != sizeof(input) ||
+        memcmp(input, expected, sizeof(input)) != 0 || getchar() != EOF)
+        return 91;
+    if (fwrite(input, 1, sizeof(input), stdout) != sizeof(input) ||
+        fputs("ordinary command", stderr) == EOF)
+        return 92;
+    return 23;
+}