Merge "Create a smart account" page and other fixes

[alexandratran]

Description

This PR:

• Merges "Create a MetaMask smart account" and "Configure accounts and signers" into one page, making clarifications and edits as needed.
  • Moves deploy parameters into the smart account API reference.
  • Updates links throughout docs as needed.
• Adds "Partner integrations" section to the DTK home page.
• Hides experimental "Store and retrieve delegations" page.

Preview

https://metamask-docs-git-dtk-fixes-consensys-ddffed67.vercel.app/delegation-toolkit/development/

Checklist

Complete this checklist before merging your PR:

• If this PR contains a major change to the documentation content, I have added an entry to the top of the "What's new?" page.
• The proposed changes have been reviewed and approved by a member of the documentation team.

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Name	Status	Preview	Comments	Updated (UTC)
metamask-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 7, 2025 9:43pm