New features: Dragon Trial, and other experience optimizations

Bug fix: When copying the diagnostic station in batches, the service range parameters are not copied together
Value adjustment: Reduce the price of dragon taming materials (from 50,000 to 20,000)
New function: Add the Dragon Trial Field
BUG fix: When there is an obstacle next to the wall gap, the door does not automatically change direction
Optimization: When switching to the island map, the merchants in the north should not spawn but on the island
Optimization: When moving the border trade port, the buildable area logo is displayed
BUG fix: When other lords still have Titans or dragons, they are judged as defeated
Value adjustment: After completing the Dragon Trial once, the next one can only be started next year
Optimization: After passing the Dragon Trial, automatically pick up the ground items and deposit them in the treasury
Optimization: Recruiting employees uses the silver in the treasury and the bank
Optimization: Employees can choose their race
Optimization: When determining whether the monster has reached the set limit in monster breeding, monster eggs are also counted