Add tentacled boss planet encounter

boss/BossEncounter.gd

@@ -0,0 +1,37 @@
+class_name BossEncounter
+extends Node2D
+
+@onready var boss: Node2D = $Boss
+@onready var status_label: Label = $EncounterUI/StatusLabel
+@onready var hint_label: Label = $EncounterUI/HintLabel
+@onready var game_state: Node = get_node("/root/GameState")
+
+
+func _ready() -> void:
+	# One persistent objective lets boss victory flow through the same conquest
+	# state as authored capture-point maps without pretending the boss is a
+	# configurable capture point.
+	game_state.register_capture_points(game_state.planet_id, 1,
+		game_state.planet_definition_id)
+	if game_state.is_planet_conquered(game_state.planet_id):
+		boss.suppress_as_defeated()
+		status_label.text = "THE WARDEN IS DEAD"
+		hint_label.text = ""
+		return
+	boss.defeated.connect(_on_boss_defeated)
+
+
+func _process(_delta: float) -> void:
+	if not is_instance_valid(boss) or boss.phase == boss.Phase.DEFEATED:
+		return
+	var phase_name: String = "PHASE II · LASER STORM" \
+		if boss.phase == boss.Phase.LASER_STORM else "PHASE I · HATCHLINGS"
+	status_label.text = "THE WARDEN · %s · EYES %d/%d" % [
+		phase_name, boss.eyes_destroyed, boss.EYE_COUNT]
+	hint_label.text = "DESTROY GOLDEN HATCHLINGS · FOLLOW THEIR LIGHT · BREAK THE OPEN EYES"
+
+
+func _on_boss_defeated() -> void:
+	game_state.mark_point_captured(game_state.planet_id, 0)
+	status_label.text = "THE WARDEN IS DEAD · PLANET CONQUERED"
+	hint_label.text = ""