Add developer certificate setup guide and install-flow cross-links

[Copilot]

This PR adds a dedicated Aspire docs page for development certificate setup and links it from install/get-started flows. It covers the new CLI trust behavior for polyglot apps (aspire run/aspire start) and the .NET-specific dotnet dev-certs path.

• New get-started documentation

  • Added /get-started/developer-certificates/ with:
    • CLI-managed trust via aspire run and aspire start
    • explicit cert lifecycle commands (aspire certs trust, aspire certs clean)
    • .NET-specific dotnet dev-certs https --trust / --clean guidance
    • troubleshooting pointers and links to deeper certificate docs

• Install-flow cross-links

  • Updated get-started/install-cli.mdx to include the new page in See also
  • Updated get-started/aspire-sdk-templates.mdx cert guidance to point to the new consolidated page

• Redirect follow-up

  • Maintainer follow-up requested: register https://aka.ms/aspire/devcerts to redirect to /get-started/developer-certificates/

# CLI-managed trust (recommended)
aspire run
aspire start

# Explicit trust/refresh
aspire certs trust
aspire certs clean
aspire certs trust

# .NET-specific path
dotnet dev-certs https --trust

[Copilot]

Pull request overview

Adds a new “Set up development certificates” get-started page and wires it into existing onboarding flows so readers can find certificate trust/setup guidance from install and template docs.

Changes:

• Added a new /get-started/developer-certificates/ documentation page covering Aspire CLI certificate trust commands and the dotnet dev-certs workflow.
• Linked the new page from the CLI install page “See also” section.
• Updated the SDK templates get-started doc to point to the consolidated certificate guidance page.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/frontend/src/content/docs/get-started/install-cli.mdx	Adds a “See also” link to the new developer certificates page.
src/frontend/src/content/docs/get-started/developer-certificates.mdx	Introduces the new consolidated developer certificates setup guide.
src/frontend/src/content/docs/get-started/aspire-sdk-templates.mdx	Replaces external certificate troubleshooting links with a pointer to the new consolidated page.

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