NO-JIRA: README: mention promotion of plugins as a way of adding a new oc command

[ingvagabund]

SSIA

[openshift-ci-robot]

@ingvagabund: This pull request explicitly references no jira issue.

In response to this:

SSIA

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[ardaguclu]

/lgtm
/hold
in case you'd want to get opinions from more people, feel free to cancel if not

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ardaguclu, ingvagabund

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[openshift-ci]

@ingvagabund: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-aws-ovn-serial	ea33a3a	link	true	/test e2e-aws-ovn-serial
ci/prow/e2e-metal-ipi-ovn-ipv6	ea33a3a	link	false	/test e2e-metal-ipi-ovn-ipv6

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[openshift-bot]

Issues go stale after 90d of inactivity.

Mark the issue as fresh by commenting /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.
Exclude this issue from closing by commenting /lifecycle frozen.

If this issue is safe to close now please do so with /close.

/lifecycle stale

[ingvagabund]

/remove-lifecycle stale

[openshift-bot]

Issues go stale after 90d of inactivity.

Mark the issue as fresh by commenting /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.
Exclude this issue from closing by commenting /lifecycle frozen.

If this issue is safe to close now please do so with /close.

/lifecycle stale

[openshift-bot]

Stale issues rot after 30d of inactivity.

Mark the issue as fresh by commenting /remove-lifecycle rotten.
Rotten issues close after an additional 30d of inactivity.
Exclude this issue from closing by commenting /lifecycle frozen.

If this issue is safe to close now please do so with /close.

/lifecycle rotten
/remove-lifecycle stale

[ingvagabund]

/close

[openshift-ci]

@ingvagabund: Closed this PR.

In response to this:

/close

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