move each solutions to days folder

Author: 66a-11a4S

CMakeLists.txt

@@ -3,4 +3,4 @@ project(AoC2023)
 
 set(CMAKE_CXX_STANDARD 17)
 
-add_executable(AoC2023 main.cpp Vector2.cpp Vector3.cpp Vector2Int.cpp Day1.cpp Day2.cpp Day3.cpp Day4.cpp Day5.cpp Day6.cpp Day7.cpp Day8.cpp Day9.cpp Day10.cpp Day11.cpp Day12.cpp Day13.cpp Day14.cpp Day15.cpp Day16.cpp Day17.cpp Day18.cpp Day19.cpp Day20.cpp Day21.cpp Day22.cpp Day23.cpp Day24.cpp Day25.cpp)
+add_executable(AoC2023 main.cpp days/Vector2.cpp days/Vector3.cpp days/Vector2Int.cpp days/Day1.cpp days/Day2.cpp days/Day3.cpp days/Day4.cpp days/Day5.cpp days/Day6.cpp days/Day7.cpp days/Day8.cpp days/Day9.cpp days/Day10.cpp days/Day11.cpp days/Day12.cpp days/Day13.cpp days/Day14.cpp days/Day15.cpp days/Day16.cpp days/Day17.cpp days/Day18.cpp days/Day19.cpp days/Day20.cpp days/Day21.cpp days/Day22.cpp days/Day23.cpp days/Day24.cpp days/Day25.cpp)