Implement CheckParryFeature and CheckDefenseFeature in Unit.attackcheck.cs

- Uncommented and implemented CheckParryFeature (切り払い＆反射)
- Uncommented and implemented CheckDefenseFeature (バリアなど防御能力)
- Converted goto patterns to if-block equivalents
- Fixed type casts (int assignments from double expressions)
- Fixed method calls: Feature(i).Name, Feature(i).FeatureName0(t), etc.
- Fixed weapon method calls to use UnitWeapon API
- Fixed SetConditionLevel to use Condition().Level pattern
- Fixed local functions with object argIndex1 parameters

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Copilot