Update samples for Bluetooth central

[AdrianSoundy]

Description

Added 2 samples for Bluetooth Central/Client

• Simple Watcher (Central1)
• Data collection sample (Central2)

Also updated Sample 3 to use as a test client for Central2 by adding code to change temperatures.

The reference to the Bluetooth Assembly is currently hard coded to assembly path. This will need to be changed to reference assembly on your system.

Once a NuGet is available these samples will be updated in this PR.

Motivation and Context

Required for new Bluetooth Central updates

How Has This Been Tested?

Types of changes

• [x] Improvement (non-breaking change that improves a sample)
• [ ] Bug fix (fixes an issue with a current sample)
• [x] New Sample (adds a new sample)
• [ ] Config and build (change in the configuration and build system, has no impact on code or features)

Checklist:

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

Signed-off-by: AdrianSoundy [email protected]