Add WithBun() documentation to JavaScript integration page

[Copilot]

Documents the new WithBun() extension method added in dotnet/aspire#13733 for using Bun as a package manager with JavaScript/Vite apps.

Changes

• Updated intro and Vite app sections to include Bun in supported package managers list
• Added "Use Bun" section following existing npm/yarn/pnpm pattern:
  • Basic usage and installArgs customization
  • Lockfile detection (bun.lock/bun.lockb) behavior
  • No -- separator needed for script arguments
  • Automatic oven/bun:1 build image for container publishing

Example

var app = builder.AddViteApp("app", "./app")
    .WithBun();

// With custom install args
var customApp = builder.AddViteApp("custom-app", "./custom-app")
    .WithBun(installArgs: ["--frozen-lockfile"]);

Screenshot

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/CommunityToolkit/Aspire/contributors
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• https://api.github.com/repos/dotnet/aspire-samples/contributors
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• https://api.github.com/repos/dotnet/aspire/contributors
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• https://api.github.com/repos/microsoft/aspire.dev/contributors
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (http block)
• learn.microsoft.com
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (dns block)
• telemetry.astro.build
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (dns block)
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js dev --host log �� %aE ���� --follow p/bin/git ands/aspire-deplgit om/microsoft/asplog e/git git log �� %aE ���� --follow p/bin/git ands/aspire-run.node --follow ../pagefind@1.4 git (dns block)
• vimeo.com
  • Triggering command: /usr/local/bin/node node /home/REDACTED/work/aspire.dev/aspire.dev/src/frontend/node_modules/.bin/../astro/astro.js build (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Implement an update to the existing JS content that details the newly added API: dotnet/aspire#13733

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