[DOCS-XXXXX] Add Get Started with Private Actions (Execution Policies quickstart)

[irving-santiago]

What does this PR do? What is the motivation?

Fixes DOCS-XXXXX

Adds a new "Get Started with Private Actions" quickstart: deploy a runner in the Datadog Agent with the Datadog Operator, and run a first read-only action authorized automatically by Datadog's default Execution Policies. Moves the 2 real screenshots this page uses into static/images/.

Merge readiness

• Ready for merge

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• ⚠️ Your branch name MUST follow the <name>/<description> convention and include the forward slash (/). If you've already created your PR with an incorrect branch name, please rename your branch and open a fresh PR.
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AI assistance

Claude Code carried this page's content over from a pre-drafted, QA-verified draft, ran Vale, and moved its 2 screenshots into the repo.

Additional notes

This is the last slice in the stack and exercises the full flow end-to-end.

[irving-santiago]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• [DOCS-XXXXX] Add Get Started with Private Actions (Execution Policies quickstart) #39054 👈 (View in Graphite)
• [DOCS-XXXXX] Add Private Actions Reference #39053
• [DOCS-XXXXX] Rewrite Run a Script for Execution Policies #39052
• [DOCS-XXXXX] Add Execution Policies #39051
• [DOCS-XXXXX] Add Authorize Private Actions #39050
• [DOCS-XXXXX] Add Enrollment and Ownership #39049
• [DOCS-XXXXX] Add Set Up a Standalone Private Action Runner #39048
• [DOCS-XXXXX] Rewrite Set Up in the Datadog Agent, add Execution Policies enrollment #39047
• [DOCS-XXXXX] Move Handling Private Action Credentials under Connections #39046
• [DOCS-XXXXX] Rewrite Private Actions Overview for Execution Policies #39045
• Add tracking doc for the Private Actions / Execution Policies stack #39044
• master

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[github-actions]

Preview links (active after the build_preview check completes)

New or renamed files

• https://docs-staging.datadoghq.com/irving.santiago/par-ep-10-getting-started/actions/private_actions/getting_started

[datadog-official]

⚠️ Warnings

🚦 1 Pipeline job failed

DataDog/documentation | build_preview     

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