Change project structure;

Added new c# binding;

native/header/Common/String.h

@@ -0,0 +1,105 @@
+#ifndef STRING_H
+#define STRING_H
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+inline char* string_copy(const char* source)
+{
+    if (source == NULL)
+    {
+        return NULL;
+    }
+
+    size_t len = strlen(source) + 1;
+    char* copy = (char*)malloc(len);
+    if (copy == NULL)
+    {
+        return NULL;
+    }
+
+    strcpy_s(copy, len, source);
+    return copy;
+}
+
+inline bool is_absolute_path(const char* path)
+{
+    if (path == NULL)
+    {
+        return false;
+    }
+
+#ifdef _WIN32
+    // 1) Drive-letter paths: "C:\…", "D:/…"
+    if (isalpha((unsigned char)path[0]) && path[1] == ':' && (path[2] == '\\' || path[2] == '/'))
+    {
+        return true;
+    }
+
+    // 2) UNC paths: "\\server\share\…"
+    if (path[0] == '\\' && path[1] == '\\')
+    {
+        return true;
+    }
+    return false;
+#else
+    // POSIX: anything starting with '/'
+    return path[0] == '/';
+#endif
+}
+
+inline void get_path_directory(const char* path, char* out, size_t out_size)
+{
+    if (path == NULL || out == NULL || out_size == 0)
+    {
+        if (out && out_size > 0)
+        {
+            out[0] = '\0'; // ensure output is empty on invalid input
+        }
+        return;
+    }
+
+    const char* last_slash = strrchr(path, '/');
+
+    if (last_slash == NULL)
+    {
+        if (out_size > 0)
+        {
+            out[0] = '\0';
+        }
+        return;
+    }
+
+    size_t dir_len = (size_t)(last_slash - path + 1);
+
+    if (dir_len >= out_size)
+    {
+        dir_len = out_size - 1;
+    }
+
+    memcpy(out, path, dir_len);
+    out[dir_len - 1] = '/';
+    out[dir_len] = '\0';
+}
+
+inline void string_join(const char* a, const char* b, char* out, size_t out_size)
+{
+    if (a == NULL || b == NULL || out == NULL || out_size == 0)
+    {
+        return;
+    }
+
+    size_t a_len = strlen(a);
+    size_t b_len = strlen(b);
+
+    if (a_len + b_len + 1 >= out_size)
+    {
+        return;
+    }
+
+    strcpy_s(out, out_size, a);
+    strcat_s(out, out_size, b);
+}
+
+#endif // STRING_H