Update the source and destination directory naming convention to "toX" and "fromX"

**Is your feature request related to a problem? Please describe.**

Users report getting confused about synching directories like `/groundstation` and `/spacestation` and not knowing which directory they're accessing on their respective groundstation or spacestation.

**Describe the solution you'd like**

Instead, they'd like to have:

- `/toSpacestation` on the groundstation synchronize with `/fromGroundstation` on the spacestation
- and `/toGroundstation` on the spacestation synchronize with `fromSpacestation` on the groundstation

**Describe alternatives you've considered**

@bigtallcampbell has a version of the rsync command working in this fashion here: https://github.com/bigtallcampbell/mock-spacestation/blob/main/.devcontainer/setupScripts/deployGroundStation.sh#L233-L243

**Additional context**
n/a