docs: Updating documentation structure and content in the tutorial section

[AnaisUrlichs]

Description

• Converting the Quick-start section into tutorials
• Moving integrations into the tutorials section
• adding three tutorials; Trivy Kubernetes, GitOps, and installing Trivy into ovh cloud
• I made the installation section more visible by moving it to the main index.md

Checklist

• [x] I've read the guidelines for contributing to this repository.
• [x] I've followed the conventions in the PR title.
• [ ] I've added tests that prove my fix is effective or that my feature works.
• [x] I've updated the documentation with the relevant information (if needed).
• [ ] I've added usage information (if the PR introduces new options)
• [ ] I've included a "before" and "after" example to the description (if the PR is a user interface change).

[CLAassistant]

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2 out of 3 committers have signed the CLA.

:white_check_mark: AnaisUrlichs
:white_check_mark: knqyf263
:x: Anais Urlichs

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[AnaisUrlichs]

@itaysk @knqyf263 could you please check the PR again?

[AnaisUrlichs]

@knqyf263 could you please review and merge the docs with the next release or similar?

[knqyf263]

I don't have a strong opinion. I'm ok if Itay approves it. One thing to note is that we added some updates on our doc such as SBOM attestation. We need to make sure all the changes are reflected to this PR.

[AnaisUrlichs]

@knqyf263 I've merged the main branch into this one in one of my last commits

[AnaisUrlichs]

@knqyf263 just merged main into it

[knqyf263]

@AnaisUrlichs Thanks. @itaysk Would you review this PR?

[AnaisUrlichs]

@itaysk @knqyf263 I made several changes based on your comments

• removed the Kubernetes tutorial from the tutorials section and added it to the community tutorials
• made it clearer what community tutorials are and where they go in the docs
• clarified what CKS stands for with a link
• merged in latest changes from main

[itaysk]

consider adding tekton tutorial: https://www.redhat.com/architect/cicd-pipeline-openshift-tekton

[AnaisUrlichs]

@knqyf263 could you please have another look 🙃

[knqyf263]

@AnaisUrlichs Would you resolve conflicts and merge the main branch? Then I hope we can merge this PR🤞

[AnaisUrlichs]

@knqyf263 merged main and resolved conflicts

[knqyf263]

I saw several rendering errors and fixed them. Also, I added some small changes.

[knqyf263]

@AnaisUrlichs Do you have two accounts? Looks like one of them has not signed CLA yet. https://github.com/aquasecurity/trivy/pull/2333#issuecomment-1156868203