Expose BLE characteristic properties through DeviceCharacteristic

[dhruv4023]

Problem

DeviceCharacteristic currently does not expose the properties of the underlying BLE characteristic.

On Darwin, CoreBluetooth provides CBCharacteristic.properties, which contains information about the operations supported by a characteristic, such as:

• Read
• Write
• Write Without Response
• Notify
• Indicate

Applications communicating with BLE peripherals may need this information to select the appropriate operation. For example, a peripheral may support Write Without Response but not Write.

Proposed solution

Expose the characteristic properties through DeviceCharacteristic, allowing callers to inspect the supported operations.

For Darwin, this could initially be exposed through:

func (c DeviceCharacteristic) Properties() cbgo.CharacteristicProperties

This would allow callers to check properties such as:

properties := characteristic.Properties()

if properties&cbgo.CharacteristicPropertyWriteWithoutResponse != 0 {
    // Write without response
}