* feat: add ICMP ping check support to item
* Replaced ping package with pingman package to be compliant with Dashy CI NodeJS version (20).
Fixed a behavior bug in status indicator component which didn't changed icon to yellow when checking.
Made otherStatusText a computed field to make it reflecting dynamically a new check request.
Added more examples to default conf.yml
* Removed a forgotten trace to console
* Made changes requested by Lissy after review of the PR.
Corrected tests using localhost which is not a valid host for pingman.
Added a Validator.js file in src/utils with function to check validity of hosts.
Reverted conf.yml file to the original version.
* Fixed a problem in configuration of pingman call after adding support of IPV6 addresses.
* Updated Dockerfile to pass Docker smoke tests in CI
* Revert to latest version of `user-data/conf.yml` from `master`
* Removed the duplicated feature line for ping check and just added `hosts` to the existing one
* Removed the unused `shouldEnabledPingCheck` function
* Add the ping system package and give rights to use to the node user so the pingman module can work in Docker container
* Remove `src/utils/Validator.js` file. Rely on `pingman` internal validation of hostname instead to avoid command injection.
