Bryce/actions catalog

[buraizu]

What does this PR do?

Adds content to the Workflows product documentation actions catalog, and adds a page about generic actions.

Motivation

DOCS-4075 This section corresponds to the following outline, agreed upon by the Documentation team and Sarjeel:

4. Workflows Actions Catalog a. (P1) Workflow Integration Actions b. (P1) Generic Actions

Additional Notes

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Reviewer checklist

• [ ] Review the changed files.
• [ ] Review the URLs listed in the Preview section.
• [ ] Check images for PII
• [ ] Review any mentions of "Contact Datadog support" for internal support documentation.

[github-actions[bot]]

Preview links (active after the build_preview check completes)

New or renamed files

Modified Files

• https://docs-staging.datadoghq.com/bryce/actions-catalog/workflows/actions_catalog/
• https://docs-staging.datadoghq.com/bryce/actions-catalog/workflows/actions_catalog/generic_actions

[davidejones]

Just a headsup reading the comments. The btn_hidden beta callout feature was just added to master a few days ago in #15530 So its likely not working in this branch as it doesn't have those changes yet.