[BUG] Asset Installer fails to install assets if directory already exists

[FejZa]

Reality Collective - Service Framework Bug Report

Describe the bug

Currently, the asset installer module of the package installer feature will only install assets, if the target directory does not exist. So e.g. if RealityToolkit.Core already exists in the Generated Assets folder, then it will just assume everything is installed. This makes incremental updates of the toolkit hard, since newly added assets are not imported at all.

Solution

Instead of only checking for the directory, do a file-by-file basis check to ensure any missing asset files are copied over.