Test: fill the fields main added since this branch

Merging main left a test initializer without the field main added
(TridentSave.fire_ticks / Interface.initial_values and
Resources.shadow_linear), so the test target stopped compiling.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

crates/horizon-client/src/entity_nbt.rs

@@ -4226,6 +4226,7 @@ mod tests {
                 dealt_damage: false,
                 creative_only: false,
                 no_gravity: false,
+                fire_ticks: 0,
                 item: &trident,
             },
             [0; 4],