Add mount files

scripts/mount/mount_profile.gd

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+# res://scripts/mount/mount_profile.gd
+@tool
+class_name MountProfile
+extends Resource
+
+enum Surface {
+	GROUND = 1,
+	WATER = 2,
+	AIR = 4,
+	LAVA = 8,
+}
+
+@export var species : PokemonData
+@export_flags("Terre:1", "Eau:2", "Ciel:4", "Lave:8") var surfaces : int = Surface.GROUND
+
+@export_group("Mouvement")
+@export var mount_speed : float = 8.0
+@export var mount_accel : float = 6.0
+@export var mount_deccel : float = 7.0
+@export var mount_jump_height : float = 2.5    # ignoré si AIR est actif (vol libre plutôt que saut)
+
+@export_group("Attache")
+@export var seat_offset : Vector3 = Vector3(0, 1.2, -0.3)
+@export var mount_scene_override : PackedScene  # sinon utilise species.model_scene
+
+func can_use_surface(surface : Surface) -> bool:
+	return (surfaces & surface) != 0

scripts/mount/mount_registry.gd

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+# res://scripts/mount/mount_registry.gd  (autoload)
+extends Node
+
+const MOUNTS_DIR := "res://data/mounts/"
+
+var _by_species : Dictionary = {}   # nom d'API -> MountProfile
+
+func _ready() -> void:
+	for file in ResourceLoader.list_directory(MOUNTS_DIR):
+		if file.ends_with("/"): continue
+		var profile := load(MOUNTS_DIR + file) as MountProfile
+		if profile and profile.species:
+			_by_species[profile.species.api_name] = profile
+
+func get_profile(d : PokemonData) -> MountProfile:
+	if d == null: return null
+	return _by_species.get(d.api_name)
+
+func is_mountable(d : PokemonData) -> bool:
+	return get_profile(d) != null
+
+## Le pokémon peut-il être monté sur CETTE surface précisément ?
+func can_mount_on(d : PokemonData, surface : MountProfile.Surface) -> bool:
+	var p := get_profile(d)
+	return p != null and p.can_use_surface(surface)