Re-arrange for SmartThings IDE github integration

[loverso]

I rearranged the files and updated them so that this repo works in the SmartThings IDE github integration.

The basic change is to move the files from SmartThings/DeviceTypes to devicetypes/shackrat.
Each source has to be in a subdirectory named with ".src" and the filenames need to be all lowercase.
Each "name:" in the definition needs to match the filename (so I had to add "SmartThings" to each "name:").

[loverso]

I wrote:

Each "name:" in the definition needs to match the filename (so I had to add "SmartThings" to each "name:").

This is incorrect, as it causes the package name to not be what the code expects when it tries to add a new virtual device. I found this out last night when I tried to share a device from Hubitat=>ST and the device didn't up in ST, and there was an error in the live logging. I'm about to update this to remove "SmartThings" from each "name:" and to rename the files to remove that from the name.