[WSL] Fail gracefully upon detection of invalid environment.

[kdewald]

Quick summary for people who are just getting to this issue for the first time:

• WSL does not support Bluetooth. It's currently a limitation on their side, nothing we can do.
• However, SimpleBLE (and any derived bindings) are not handling the case gracefully, instead crashing with an "Object not Initialized" error.

This issue is designed to group the necessary work in detecting the condition and causing the code to fail gracefully.

[kdewald]

For reference, I plan to implement the following check: microsoft/WSL#423

[kdewald]

Although not exactly the full explicit solution, this should be enough to detect this problem quickly: #198