NimBLE Rust wrapper for ESP32

Features

• [x] GATT client
  • [x] Scan
  • [x] Services
  • [x] Characteristics
  • [ ] Broadcast
  • [x] Read
  • [x] Write
  • [x] Notify
  • [x] Indicate
  • [x] Descriptors
  • [x] Read
  • [x] Write
  • [ ] Encryption