[BUG]: To be a valid ‘mcplot’ solution, mcplot-html needs an option for scan (mccode.dat) data

**Describe the bug**
At the moment mcplot-html only supports single folders of simulation output including 1D and 2D datasets. Scan collections are not supported.

**Output: empty page**
<img width="1094" height="929" alt="Image" src="https://github.com/user-attachments/assets/098d61c9-47fb-4b76-a12c-8c3b950c09cc" />
