Update Beta0.62_V4.4.1

1、Added a new type of melee weapon: spear. 2、Added multiple modifications for airguns.Including: high-pressure gas tank, electric air pump, muzzle throttle valve, etc. 3、Added some new items and new recipes. 4、Added an option for animation frame skipping optimization. 5、Added a button to pick up all items on the ground. 6、Mouse cursor can now select interactive objects within range. 7、The font size option now affects more UI interfaces. 8、The backpack can now be dismantled. 9、New skill: Airgun Expert. 10、New item: Tire Sealant. 11、Purchasing a magazine no longer includes 'free' bullets. 12、Increased the durability of firearm attachments. 13、Reduced the crafting time for ammunition. 14、Fixed an issue where character saves caused errors. 15、Fixed an issue where the shortcut bar appeared while driving. 16、Fixed an issue where some roads generated inside buildings. 17、Fixed an issue when using CAS system with electromagnetic gun. 18、Optimized and adjusted the animation while moving with a melee weapon. 19、Slightly increased the durability of vehicles.