Improve plugin uninstall output when connections remain

[kaidaguerre]

the current output is a bit messy and confusing. Also the pluralising is wrong:

$ sp plugin uninstall hackernews

The following file has steampipe connections using the 'hackernews' plugin:

        * 'hackernews' in /Users/kai/.steampipe/config/hackernews.spc, line 1

Please remove them to continue using steampipe

Uninstalled plugin hackernews

Maybe should be more like:

$ sp plugin uninstall hackernews

Uninstalled plugin hackernews

Note: the following file has a steampipe connectionsusing the 'hackernews' plugin:
        *  file: /Users/kai/.steampipe/config/hackernews.spc 
           connection: 'hackernews' (line 1)

Please remove it to continue using steampipe

$ sp plugin uninstall hackernews

Uninstalled plugin hackernews

Note: the following file has steampipe connections using the 'hackernews' plugin:
        *  file: /Users/kai/.steampipe/config/hackernews.spc 
           connection: 'hackernews' (line 1)
           connection: 'hackernews2' (line 8)


Please remove it to continue using steampipe

$ sp plugin uninstall hackernews

Uninstalled plugin hackernews

Note: the following files have steampipe connections using the 'hackernews' plugin:
        *  file: /Users/kai/.steampipe/config/hackernews.spc 
           connection: 'hackernews' (line 1)
        *  file: /Users/kai/.steampipe/config/hackernews2.spc 
           connection: 'hackernews2' (line 1)
           connection: 'hackernews3' (line 8)

Please remove them to continue using steampipe