[Bug]: Bevy 0.12 migration broke colcon workflow

[luca-della-vedova]

Before proceeding, is there an existing issue or discussion for this?

• I have done a search for similar issues and discussions.

Description

Since #206 there is now a panic on startup when running the site editor through ros2 run. The panic is internal in a bevy macro here:

called `Option::unwrap()` on a `None` value

I'll be investigating but I believe this might be due to how the embedded_asset macros lookup the path and how colcon relocates the executable.
If all fails will just revert to the previous way of doing things when we implemented pretty much the same functionality ourselves.