Optimised content:
1.Character movement speed
2. Hit feedback
3. Reduce carrier speed
4. Only interrupt healing when discarding healing items (including petrol)

Fix bugs:
1. Abnormal movement speed when aiming
2. Aiming view is cancelled when you open the backpack while aiming.
3. Continuous firing problem after switching weapons
4. Backpack props error
5. Backpack weapon dragging position is wrong.
6. Shotgun damage abnormality
7. Activity does not increase
8. Characters can not push the carrier
9. Serious frame drops when opening backpack