TermBot: SSH + hardware keys

TermBot is an SSH client that supports authentication with YubiKeys, Nitrokeys and other OpenPGP cards over NFC and USB.

For this it uses the Hardware Security SDK available at https://hwsecurity.dev

Supported hardware:
NFC:
- Cotech Card
- Fidesmo Card
- YubiKey NEO
- YubiKey 5 NFC

USB:
- Nitrokey Start, Pro, Storage (with adapter)
- YubiKey 4, 4 Nano, 5, 5 Nano (with adapter)
- YubiKey 4C, 4C Nano, 5C, 5C Nano (directly over USB-C)
- Gnuk (with adapter)
- Secalot (with adapter)

TermBot is based on ConnectBot.

Recent changes:
1.9.6-151
* Update to Hardware Security SDK 4.4.0
* Support Ed25519 keys
* Key generation on OpenPGP security keys

1.9.6-42
* Update to Hardware Security SDK 4.2.1

1.9.6-42
* PIN input: up to 16 digits
* PIN input: hardware keyboard support
* Automatically detect NFC hardware after entering a PIN

1.9.5-77
* Fix crash on older Android versions
* NFC stability and responsiveness has been improved
* In-app shop for OpenPGP cards