feat: Bluetooth LE blocks

[mmvanheusden]

Documented in #146

This PR adds the Bluetooth blocks to Leaphy webbased svelte.

This adds the requirement of the ArduinoBLE library to ESP32-based boards. This library is a fork of the original ArduinoBLE, with added abstraction for Leaphy. This abstraction makes the code that will end up on the Leaphy easier to understand.

[rmoesbergen]

Documented in #146

This PR adds the Bluetooth blocks to Leaphy webbased svelte.

This adds the requirement of the ArduinoBLE library to ESP32-based boards. This library is a fork of the original ArduinoBLE, with added abstraction for Leaphy. This abstraction makes the code that will end up on the Leaphy easier to understand.

@mmvanheusden This is very cool! What do you use to test the blocks, an app on your phone?

About the ArduinoBLE lib: instead of making a fork, we have the leaphy-extensions library that we use for 'wrappers' around public arduino libraries like ArduinoBLE. You can add your custom code there and add ArduinoBLE as a dependency to the leaphy-extensions lib in library.properties. It will then be installed automatically on the backend and your custom class/functions can be included in the code generator for your blocks. This way we don't have to maintain a fork and it saves a lot of hassle with library installation. This will also make your PR for backend unnecessary.

So please add the forked code to our extensions lib and change the requirements in this PR (no need to add ArduinoBLE to required libs anymore). Other than that: 👍🏻

[mmvanheusden]

@rmoesbergen

What do you use to test the blocks, an app on your phone?

I use the mobile app "LightBlue" for testing, you can connect to BLE devices and send and receive data to BLE characteristics.

So please add the forked code to our extensions lib and change the requirements in this PR (no need to add ArduinoBLE to required libs anymore). Other than that: 👍🏻

Done :) 👍