Many fixes to many things

[aaronfranke]

• Ensure files end in newline characters, enforced in 3.2.

• Use parenthesis for assert statements, required in 3.2.

• Fix BitFlag parse error of not all paths return a value.

• Update Geometry2D when the offset position is changed.

• Fix spelling error and warning in Trail2D. Updated the icon's trail color to be transparent.

• Fix useless and confusing code in Trail3D. Added an icon for Trail3D.

[willnationsdev]

I appreciate you adding all of this. I should probably switch around the way I've done the deployment since, right now, there is a dedicated 3.2 branch and master is more or less for 3.1.x. It should really be the other way around. Need to find time to update it...

Edit: To be more clear, if I merged this as-is, it would probably mess up 3.1 projects that are pulling from the master branch in the Godot Asset Library. So I need to move things around or you would need to PR it into the 3.2 branch (but I should be making things easier for contributors such as yourself, so...yeah, it needs to be fixed the other way).

[aaronfranke]

@willnationsdev None of these changes break 3.1 compatibility, it all still works with 3.1.

[willnationsdev]

@aaronfranke Ah, so it would seem. I just looked through everything in more detail. Thanks!