doctl .deb package

**What is the problem this feature would solve? Please describe.**

The current installation process involves multiple manual actions and completely avoids any sort of package management.

**Describe the solution you'd like**

Create a .deb release artifact would allow it to be installed with a single command, just as remove/update the package more easily

**Additional context**

For example, railway's CLI is released as a deb package and installing that is way more convenient than fiddling with the binary directly