[docs] Document standalone Native AOT TerminalHost executable

[aspire-repo-bot]

Documents changes from microsoft/aspire#20775

@mitchdenny

Why

This PR is needed because microsoft/aspire#20775 ships TerminalHost — the process backing [resource terminals]((aspire.dev/redacted) — as a standalone, self-contained Native AOT executable (terminalhost/Aspire.TerminalHost[.exe]) in CLI bundles, instead of running inside the managed aspire-managed process. Although the public WithTerminal() API is unchanged, this is a user-facing architectural change (confirmed by the PR body's "User-facing usage" section) and a target-framework change (src/Aspire.TerminalHost/Aspire.TerminalHost.csproj now targets net11.0 with PublishAot=true), which were the signals that triggered this automated docs check:

• pr_body_has_user_facing_section — the PR body has an explicit "User-facing usage" heading.
• pr_body_has_cli_flag_mention — the body documents CLI/build flag usage for repository developers.
• target_framework_changed — Aspire.TerminalHost.csproj's TargetFramework changed and PublishAot was added.

What changed

Targeting release/17.0 based on the source PR milestone 17.0.

Added a new "🖥️ TerminalHost ships as a standalone Native AOT executable" section to src/frontend/src/content/docs/whats-new/aspire-17.mdx (the in-progress Aspire 17.0 release notes), covering:

• The move from the managed aspire-managed process to the standalone terminalhost/Aspire.TerminalHost[.exe] Native AOT executable shipped in CLI bundles.
• That the existing WithTerminal() API is unchanged, with the same example from the source PR description.
• The aspire-managed terminalhost compatibility shim that forwards to the native executable for older/unrecognized Hosting versions.
• Links back to the source PR and to the repository development notes in docs/specs/with-terminal.md for contributors who need to rebuild the framework-dependent relay locally.

Files modified

• src/frontend/src/content/docs/whats-new/aspire-17.mdx (updated)

No new pages were created; this is an addition to the existing in-progress release-notes page for Aspire 17.0.

Generated by PR Documentation Check for #20775 · copilot · auto · 91.8 AIC · ⌖ 13.6 AIC · ⊞ 20.4K · ◷

[aspire-repo-bot]

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