chore: Update che-operator description

[tolusha]

Signed-off-by: Anatolii Bazko abazko@redhat.com

What does this PR do?

Update che-operator description

Screenshot/screencast of this PR

    A collaborative Kubernetes-native development solution that delivers OpenShift workspaces and in-browser IDE for rapid cloud application development.
    This operator installs PostgreSQL, Plugin and Devfile registries, Dashboard, Gateway and the Eclipse Che server, as well as configures all these services.
    OpenShift OAuth is used directly for authentication. TLS mode is on.

    ## How to Install
    Press the **Install** button, choose the channel and the upgrade strategy, and wait for the **Installed** Operator status.
    When the operator is installed, create a new Custom Resource (CR) of Kind CheCluster (click the **Create New** button).
    The CR spec contains all defaults. You can start using Eclipse Che when the CR status is set to **Available**, and you see a URL to Eclipse Che.

    ## Defaults
    By default, the operator deploys Eclipse Che with:
    * 10Gi storage
    * Auto-generated passwords
    * Bundled PostgreSQL
    * Bundled Plugin and Devfile registries

    Use `oc edit checluster/eclipse-che -n eclipse-che` to update Eclipse Che default installation options.
    See more in the [Installation guide](https://www.eclipse.org/che/docs/che-7/installation-guide/configuring-the-che-installation/).

    ### Certificates
    Operator uses a default router certificate to secure Eclipse Che routes.
    Follow the [guide](https://www.eclipse.org/che/docs/che-7/installation-guide/importing-untrusted-tls-certificates/)
    to import certificates into Eclipse Che.

What issues does this PR fix or reference?

eclipse-che/che#20981

How to test this PR?

N/A

PR Checklist

As the author of this Pull Request I made sure that:

• The Eclipse Contributor Agreement is valid
• Code produced is complete
• Code builds without errors
• Tests are covering the bugfix
• Custom resource definition file is up to date
• OLM bundles are up to date
• The repository devfile is up to date and works
• Sections What issues does this PR fix or reference and How to test this PR completed
• Relevant user documentation updated
• Relevant contributing documentation updated
• CI/CD changes implemented, documented and communicated

Reviewers

Reviewers, please comment how you tested the PR when approving it.

[codecov]

Codecov Report

Merging #1283 (b1a187e) into main (bb3c53c) will not change coverage.
The diff coverage is n/a.

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  Files          84       84           
  Lines        8760     8760           
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  Hits         4991     4991           
  Misses       3273     3273           
  Partials      496      496           

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[mmorhun]

TLS mode is on

Do we still support non TLS mode? If no, maybe just drop the phrase or say that it just uses HTTPS for external routes.

[tolusha]

We don't support non TLS mode. I've added this phrase just to emphasize

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: AndrienkoAleksandr, mmorhun, tolusha

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