Al-Mubin Khan Nabil

Results 2 issues of Al-Mubin Khan Nabil

As discussed in the issue, changed `model_vars[var]` in the datacollector from list to dictionary to keep the `step` column in `get_model_vars_dataframe()` and `get_agent_vars_dataframe()` synchronized. Changed the `test_datacollector.py` accordingly to fit...

## PR summary Addresses #25032. Requires review for closing #25032 Modified `gallery_order.py` to read ordering of examples from `galleries/plot_types` and its subdirectories. It adresses the issue described in #25032 but...

Documentation: plot types
Documentation: examples