Revamp godot.natvis to improve VS debugging experience

[nikitalita]

This updates the natvis files for godot substantially and makes debugging the Godot engine in Windows a lot more pleasant:

• Adds Array, TypedArray, Dictionary, and NodePath visualizers
• Displays HashMap entries by [key] = [value] by default, similar to the MS std::map visualizer
• Fixes bugs with Variant display for Object and all of the packed arrays
• StringName summary view no longer displays only memory address if cname is set

[akien-mga]

Thanks!