v1.26 Character ability and skill upgrade system

☑ Added character upgrade and skill tree upgrade system. You can see the character upgrade information by switching the button in the inventory interface. When you accumulate a certain amount of experience, you will get skill points, you can choose to upgrade different abilities and skill trees
☑ Make skill icons
☑ Added 4 new dynamic music that plays randomly. Press Q to open the action interface and choose to dance. If you don’t like the music, you can close it and then dance to play new music. The longest music can be played is 3 minutes. New dancing animations will be updated in the future
☑ Construction is prohibited within 50 meters of the NPC Trader’s hut area. Construction is prohibited at the entrance and staircase area of ​​the city map mall to prevent being surrounded by a large number of buildings and blocking other players from entering. For malicious construction, the administrator has the right to demolish
☑ Fix the problem of user data loss caused by the destruction of the character object when saving user data
☑ Change official server to asynchronous server saving
☑ Add the purchase of ammunition from NPC Trader
☑ In PVE mode, except AI, nothing else can attack the player. PVE mode disables Remote control bomb, Landmines and traps to hurt players
☑ Improved Pets do not attack other players in PVE
☑ Reduced the speed of deducting HP when thirsty and hungry
☑ Hide the return to main menu button on the death menu. You need to revive and then choose to exit to prevent the server from saving empty data
☑ UI layout adjustment, you can switch between inventory and production list interface, or switch to character information and upgrade skill tree interface
☑ Fixed the problem that the totem that has been interacted can be interacted with by another person after pressing E
☑ Adjust the automatic scaling of item names in the purchase interface to prevent incomplete display due to long names
☑ Adjust the collision at the entrance of the city map mall to prevent the Yeti from being stuck at the entrance and unable to enter the building
☑ Increase the probability of actively attacking animals refreshing and spawning
☑ Fix the city terrain error
☑ Increase the durability of the reinforced door
☑ Press C to summon animals and add a whistle sound