Implicit Casts in GDScript.md

… because Google gave me no results when this curiosity came to me.

Testing method: I generated a .gd script using Ruby’s Array#permutation and Array#product. Then I let Godot 4.1.0’s code editor (statically?) check for errors. I have not run any of the GDScript.

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• First – Between Variant and anything (i.e. dynamic typing support)
• Between int, float and bool (Between float and bool? Interesting.)
• Between String and StringName (as expected)
• Between String and NodePath (ditto)
• Between Rect2 and Rect2i; same for the Vectors
• Between Array and any PackedXXXArray (not even the element type matters…)
• Between Transform2D (2×3 matrix) and Transform3D (3×4 matrix)
• Between Transform3D (3×4 matrix) and Projection (4×4)
• Between Transform3D (3×4), Basis (3×3) and Quaternion (1×4)
• From int or String to Color but not Color to one of those (Implicitly convert from a color name? Pog.)
• From Object to RID but not RID to Object