Add Discord release announcements

[juliusmarminge]

What Changed

Adds a release notification script and calls it from a final Discord announcement job after GitHub Release publishing succeeds and any stable version bump finalization completes. Prereleases mention the role ID from DISCORD_RELEASE_NIGHTLY_ROLE_ID; latest releases mention the role ID from DISCORD_RELEASE_LATEST_ROLE_ID.

Why

Release announcements should be pushed automatically to Discord, but Discord webhook failures should never block publishing artifacts, publishing the CLI, or committing stable version bumps.

UI Changes

Not applicable.

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

  

Note

Add Discord release announcements to the release workflow

• Adds scripts/notify-discord-release.ts, a CLI script that posts a formatted Discord webhook message for prerelease (nightly) or latest (stable) releases, including an embed with version, tag, and release URL.
• Adds an announce_discord job to .github/workflows/release.yml that runs after a successful release and invokes the script with the appropriate role ID and metadata from workflow outputs.
• The announcement step uses continue-on-error: true, so a failed Discord post does not fail the release workflow.
• Role IDs and webhook URL are sourced from repository variables and secrets (DISCORD_RELEASE_NIGHTLY_ROLE_ID, DISCORD_RELEASE_LATEST_ROLE_ID, DISCORD_WEBHOOK_URL).

^{Macroscope summarized 5b66728.}

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✨ Finishing Touches

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