[#83] add Utils.cpp

src/vkcv/Utils.cpp

+#include <vkcv/Utils.hpp>
+#include <boost/dll.hpp>
+
+namespace utils {
+    
+    std::string absolutePath(std::string path) {
+        boost::filesystem::path root = boost::dll::program_location().parent_path();
+        boost::filesystem::path relative(path);
+        boost::filesystem::path fullpath = root / relative;
+        return fullpath.string();
+    }
+}
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