Move Randomness to wf guides

[khadni]

This pull request reorganizes and improves the documentation around randomness in CRE by moving and renaming the "Random in CRE" guide to "Using Randomness in Workflows", updating all references and sidebar navigation accordingly. This makes the documentation more discoverable and consistent for users looking to implement randomness in their workflows.

Documentation reorganization and navigation:

• Renamed and moved random-in-cre.mdx from src/content/cre/concepts/ to src/content/cre/guides/workflow/ as using-randomness.mdx, updating the title to "Using Randomness in Workflows".
• Updated the sidebar configuration to remove "Random in CRE" from the Concepts section and add "Using Randomness in Workflows" to the Guides > Workflow section. [1] [2]
• Added a redirect from the old "cre/concepts/random-in-cre" URL to the new "cre/guides/workflow/using-randomness" location to prevent broken links.

Reference and link updates:

• Updated all internal documentation links and references from "Random in CRE" to "Using Randomness in Workflows" to ensure consistency and prevent confusion. [1] [2] [3] [4]

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Project	Deployment	Actions	Updated (UTC)
documentation	Ready	Preview	Feb 6, 2026 2:26am

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