#1153 : improve offline capability

[diiinesh]

fixes #1153
Added function: doCheckNetworkStatus()

adjusted function: doInstall()

specifically the if conditions where these functions are called:

doGitPullOrClone
doUpdateUrls
doDownload

If system is offline, skip these functions.

[jan-vcapgemini]

Looks good to me.

[hohwille]

@diiinesh thanks for your PR. Your function doCheckNetworkStatus looks perfect and you also properly documented it.
However, for the integration of the checks we need to adjust. I added comments to explain why the current approach is not working correctly.
My suggestion would be:

• doGitPullOrClone: if repo is already there and pull fails, then add a doCheckNetworkStatus and if offline log a warning that the repo could not be updated because we are offline and return (continue flow)
• doInstall: if software is already installed (maybe in a different version), then add a doCheckNetworkStatus and if offline log a warning that we cannot install update because we are offline and return (if ${version} was given per arg and matches .ide.software.version we should even suppress the check and the warning and then there is nothing to do anyways and also no problem if we are offline).

[hohwille]

@diiinesh thanks for your update. Looks sane to me now. 👍
It is still a little different to the behavior of IDEasy but fine to be merged.