Remote mode and dangerous flag, other tweaks

* Add remote mode for harvesting a remote machine via a local workstation (no need to install enroll remotely)
   Optionally use `--no-sudo` if you don't want the remote user to have passwordless sudo when conducting the
   harvest, albeit you'll end up with less useful data (same as if running `enroll harvest` on a machine without
   sudo)
 * Add `--dangerous` flag to capture even sensitive data (use at your own risk!)
 * Do a better job at capturing other config files in `/etc/<package>/` even if that package doesn't normally
   ship or manage those files.

pyproject.toml

@@ -11,6 +11,7 @@ repository = "https://git.mig5.net/mig5/enroll"
 [tool.poetry.dependencies]
 python = "^3.10"
 pyyaml = "^6.0.3"
+paramiko = "^4.0.0"
 
 [tool.poetry.scripts]
 enroll = "enroll.cli:main"