Construct Vector2 & Vector2i from a single int/float value.

[WhalesState]

GDScript Example:

print(Vector2() == Vector2(0, 0) and Vector2(0) == Vector2(0, 0)) # prints "true"
print(Vector2(12) == Vector2(12.0, 12.0)) # prints "true"

print(Vector2i() == Vector2i(0, 0) and Vector2i(0) == Vector2i(0, 0)) # prints "true"
print(Vector2i(12.5) == Vector2i(12, 12)) # prints "true"

C++ Example:

print_line(Vector2(0) == Vector2(0, 0)); // prints "true"
print_line(Vector2(12) == Vector2(12.0, 12.0)); // prints "true"

print_line(Vector2i(0) == Vector2i(0, 0)); // prints "true"
print_line(Vector2i(12.5) == Vector2i(12, 12)); // prints "true"

[Ughuuu]

Nice PR but I would not change the godot sourcecode with this just yet, as it introduces a lot of changes that will generate long term merge conflicts. You can add your change most likely to godot and godot-cpp, but no need to update the godot codebase with this. Eg. the file core/input/input.cpp doesn't need to update to this new constructor, as it's internal implementation.

[WhalesState]

Will keep this as a draft, until I do some local tests if it works fine with current godot GDExtensions, then i will split it into two PRs to make it easier to be reviewed.