fix: Improve debug log in BLE connection

[Loodyy]

♻️ Current situation

I have a slight problem with the log of the connectBLE function (in platform.ts). The this.switchBotBLE object is wrapped in a template literal in JS, so the output of that log is [object Object].

💡 Proposed solution

Wrap the this.switchBotBLE object in 'JSON.stringify' to inspect it in more detail

[donavanbecker]

This change, causes this issue:

[Loodyy]

@donavanbecker
The class this.switchBotBLE is too big, so when stringifying it, a circular reference occurs. To work around this, you can log only the necessary information in the log, such as ${device.deviceType}: ${accessory.displayName} 'node-switchbot' found! or using a stringify library that prevents circular references. Which one looks better?

[donavanbecker]

I already fixed doing it a different way. If you look at the last commit in the beta branch.

[Loodyy]

Thank you!