Update .gitignore, add chain utils, modify cmake for just main atm

tests/inspect_dump.cpp

@@ -0,0 +1,23 @@
+#include <fstream>
+#include <iostream>
+#include <cstdint>
+
+int main(int argc, char* argv[]) {
+    std::ifstream in(argv[1], std::ios::binary);
+    
+    uint32_t size;
+    in.read(reinterpret_cast<char*>(&size), 4);
+    
+    std::cout << "First block size: " << size << " bytes\n";
+    std::cout << "Total blocks in file: ";
+    
+    int count = 1;
+    while (in) {
+        in.seekg(size, std::ios::cur);
+        in.read(reinterpret_cast<char*>(&size), 4);
+        if (in) count++;
+    }
+    
+    std::cout << count << "\n";
+    return 0;
+}