fix: Fix docker examples

- Moved `httpconnection` import from `clients` to `core`.
- Changed `tfgrid-sdk-ts` dashboard to playground.
- Added ipaddr to node_local().
- Added public keyword to OpenSSLGenerateArgs.
- Improved DockerEngine image and container loading.
- Added utils.contains_ssh_port.
- Improved error handling in DockerEngine.
- Improved Docker registry handling.

Co-authored-by: mariobassem12 <mariobassem12@gmail.com>
Co-authored-by: omda <mahmmoud.hassanein@gmail.com>

lib/installers/infra/coredns/cdns_install.v

@@ -4,7 +4,7 @@ import freeflowuniverse.herolib.osal
 import freeflowuniverse.herolib.osal.screen
 import freeflowuniverse.herolib.ui.console
 import freeflowuniverse.herolib.core.texttools
-import freeflowuniverse.herolib.clients.httpconnection
+import freeflowuniverse.herolib.core.httpconnection
 import os
 
 @[params]