Support plural resource nouns

[mattmoor]

Feature request

In kubectl and tkn I can use either the singular or plural for resource names, but with kn I get an error when using the plural:

kn services list
Error: unknown command 'services'
Run 'kn --help' for usage.

IMO services should simply alias service.

[rhuss]

+1 especially for commands that operate on multiple resource instances (but I wouldn't also mind so support both variants unconditionally eg. also kn services create)

[navidshaikh]

should we also consider bringing other aliases with this?

for example

• svc for services
• rev for revisions
  etc

[duglin]

svc might be too easily confused with k8s svc

[rhuss]

svc might be too easily confused with k8s svc

don't think this is a strong argument as the same applies for 'service' itself, too. (i.e. that it can be confused with a k8s 'service')

I think we can consider command shortcuts but I would do it one step after the other. @navidshaikh would you mind to open an extra issue for this ? There we could also collect the possible shortcuts (like also src for source ...)

[mattmoor]

To chime in on shortnames, muscle memory would have me typing ksvc, which is how we alias it in kubectl 😇

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[rhuss]

Fixed with 0.18