[refactor] Extract as sample code

Author: ftnext

samplecode/software-journey/hitpoint_minodriven.py

@@ -0,0 +1,17 @@
+class HitPoint:
+    MIN: Final[int] = 0
+    MAX: Final[int] = 999
+
+    def __init__(self, value: int) -> None:
+        if value < self.MIN:
+            raise ValueError(f"{self.MIN}以上を指定してください")
+        if value > self.MAX:
+            raise ValueError(f"{self.MAX}以下を指定してください")
+
+        self.value = value
+
+    def damage(self, damage_amount: int) -> HitPoint:
+        """ダメージを受ける"""
+
+    def recover(self, recovery_amount: int) -> HitPoint:
+        """回復する"""