D1002 moved `{civ}_*.xml` structures from other/ to structures/, D1796 introduced a shared parent template for the palisades, D1881 moved the `wallset_palisade.xml` from other/ to structures/, and this patch moves the individual palisade files from other/ to structures/:
* `other/palisades_rocks_*.xml` → `structures/palisade_*.xml`
* `other/palisades_angle_spike.xml` → `structures/palisade_spike_angle.xml`
* `other/palisades_small_spikes.xml` → `structures/palisade_spikes_small.xml`
* `other/palisades_tall_spikes.xml` → `structures/palisade_spikes_tall.xml`
and updates the simulation/templates files accordingly.
Afterwards, run this script to update the maps/ files.