refactor(MathTool): 重命名随机数生成方法并优化蘑菇矿挖爪属性

将 randomVector2In 重命名为 sampleInCircle，randomRingPoint 重命名为 sampleInRing，randChoiceWeightsFrom 重命名为 randomChoiceFromWeights，signBeforeStr 重命名为 toSigned
调整蘑菇矿挖爪的攻击力和掉落率，减少基础伤害至0.5，固定掉落率为0.1，优化物品掉落逻辑

scripts/Tools/Managers/CameraManager.gd

@@ -15,7 +15,7 @@ func _ready():
 func _physics_process(_delta):
 	if is_instance_valid(UIState.player):
 		position = UIState.player.position + constantOffset
-		position += MathTool.randomVector2In(shakeIntensity)
+		position += MathTool.sampleInCircle(shakeIntensity)
 		offset += ((get_global_mouse_position() - UIState.player.position).clampf(-100, 100) - offset) * 0.15
 
 static func shake(millseconds: float, intensity: float = 10, steper: Callable = func(currentValue, _totalValue, _restPercent): return currentValue):

scripts/Tools/MathTool.gd

@@ -2,16 +2,13 @@ class_name MathTool
 
 static func rate(value: float) -> bool:
 	return randf() < value
-static func randomVector2In(offset: float):
-	return Vector2(
-		randf_range(-offset, offset),
-		randf_range(-offset, offset)
-	)
-static func randomRingPoint(innerRadius: float, outerRadius: float):
+static func sampleInCircle(radius: float):
+	return sampleInRing(0, radius)
+static func sampleInRing(innerRadius: float, outerRadius: float):
 	return Vector2.from_angle(randf_range(0, 2 * PI)) * randf_range(innerRadius, outerRadius)
 static func randomChoiceFrom(array: Array):
 	return array[randi() % array.size()]
-static func randChoiceWeightsFrom(indexes: Array, weights: Array[int]):
+static func randomChoiceFromWeights(indexes: Array, weights: Array[int]):
 	var totals: Array = []
 	var index = 0
 	for i in indexes:
@@ -19,7 +16,7 @@ static func randChoiceWeightsFrom(indexes: Array, weights: Array[int]):
 			totals.append(i)
 		index += 1
 	return randomChoiceFrom(totals)
-static func signBeforeStr(value: float):
+static func toSigned(value: float):
 	return ("+" if value > 0 else "-" if value < 0 else "") + str(abs(value))
 static func percent(value: float):
 	return value / 100