Address comments from copilot on PR 48

[HaudinFlorence]

1. Try and Catch in connect and disconnect methods
2. Rewrite checkWebBluetoothSupport
3. Make arguments consistent between declaration and implementation of removeAllDevices
4. Rewrite removeAllDevices and emit signal only once, not at every device removal => it is still not okay after that see point 11.
5. Prevent Double Disconnection in _removeDeviceFromList
6. Add Null Check for native in connect Method
7. remove async in:

device.disconnected.connect( async() => {
          this._removeDeviceFromList(device);
        });

8. Return type in IBluetoothManager interface (is currently set to any)
9. In the disconnect method of BluetoothManager.Device class, consider edge case where the GATT server is already disconnected,
10. Remove device.dispose from:

  async disconnect(device: BluetoothManager.Device) {
    await device.disconnect();
    device.dispose();
  }

Indeed, in the current code, when a user calls disconnect(device), this device is disposed: this triggers the gattserverdisconnected event, which emits the disconnected signal, which calls _removeDeviceFromList and then tries to dispose again.
11. Fix multiple signal emissions in removeAllDevices: In the current code, on each loop iteration, _removeDeviceFromList() is called and a signal emitted (deviceListChanged).
12. Return undefined in connect() in BluetoothManager class for cases where device.connected is false.
13. Fix signal Emission Logic in addDeviceToList: in the current code, the signal is emitted regardless of whether the device was actually added. The signal should only been emitted when the device is newly added.
14. Prevent from double dispose() in removeDeviceFromList: In the current code, in removeDeviceFromList, you call device.dispose() after removal. It is better to first check it is not already disposed.
15. Improve requestDevice return logic to:

async requestDevice(
    registryItem: IDeviceTypeRegistryItem
  ): Promise<BluetoothDevice | undefined> {
    const isSupported = await this.checkWebBluetoothSupport();
    if (!isSupported) {
      return undefined;
    }
    return await navigator.bluetooth.requestDevice(registryItem.options);

16. Replace index lookup by using a Map
    In removeDeviceFromList, the identifier index lookup is fragile. Consider using a Map lookups instead of array indexOf: