Add Prebid Sales Agent cards to homepage product row and GitHub banner

[patmmccann]

Motivation

• Link the Prebid Sales Agent from the homepage so it appears alongside other Prebid products and GitHub projects.
• Place the product card after the Prebid User Identity card to maintain the existing ordering.

Description

• Inserted a new product card for “Prebid Sales Agent” into _layouts/home.html immediately after the Prebid User Identity card, reusing an existing product icon and adding an accessible alt text.
• Added a corresponding GitHub card to the homepage GitHub banner linking to https://github.com/prebid/salesagent and reusing an existing source icon with alt text.
• Amended the commit message to Add Prebid Sales Agent card to homepage after editing _layouts/home.html.

Testing

• Ran bundle install to install dependencies and the command completed successfully.
• Ran bundle exec jekyll build (via timeout 120 bundle exec jekyll build) and the site generation completed successfully.
• Attempted to capture a visual screenshot using Playwright, but the Chromium process crashed so a screenshot could not be produced.
• markdownlint was not applicable because no Markdown files were modified.

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Codex Task

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[muuki88]

Looks a little nasty. Should we split this into two rows?

[muuki88]

Yeah, looks a lot cleaner:

Bascially split those in two card-deck-md things

<div class="card-deck--md card-deck--products mt-4">
      <div class="card text-center">
        <div class="card-body">
          <div class="card-media"><img src="/assets/images/icon__product--prebid-js.svg" alt="Prebid.js Icon"></div>
          <div class="card-title"><h3>Prebid.js</h3></div>
          <p class="mb-4">The leading web based header bidding solution used by publishers worldwide</p>
          <a class="btn btn-outline-brand" href="/prebid/prebidjs">View Docs</a>
          <p class="mt-4"><a href="/download">Download Prebid.js</a></p>
        </div>
      </div>
      <div class="card text-center">
        <div class="card-body">
          <div class="card-media"><img src="/assets/images/icon__product--prebid-server.svg" alt="Prebid Server Icon"></div>
          <div class="card-title"><h3>Prebid Server</h3></div>
          <p class="mb-4">Moving Prebid and Header Bidding to the cloud for efficiency, scale and performance</p>
          <a class="btn btn-outline-brand" href="/prebid-server/overview/prebid-server-overview">View Docs</a>
          <p class="mt-4"><a href="https://github.com/prebid/prebid-server">Setup Prebid Server</a></p>
        </div>
      </div>
      <div class="card text-center">
        <div class="card-body">
          <div class="card-media"><img src="/assets/images/icon__product--prebid-mobile-sdk.svg" alt="Prebid Mobile SDK Icon"></div>
          <div class="card-title"><h3>Prebid Mobile SDK</h3></div>
          <p class="mb-4">Lightweight SDK enabling app publishers to move beyond the waterfall</p>
          <a class="btn btn-outline-brand" href="/prebid-mobile/prebid-mobile">View Docs</a>
          <p class="mt-4"><a href="/prebid-mobile/prebid-mobile-download">Download Mobile SDK</a></p>
        </div>
      </div>
    </div>

<div class="card-deck--md card-deck--products mt-4">
      <div class="card text-center">
        <div class="card-body">
          <div class="card-media"><img src="/assets/images/user-identity.png" width="100" alt="Prebid User Identity Icon"></div>
          <div class="card-title"><h3>Prebid User Identity</h3></div>
          <p class="mb-4">Supporting the open web while respecting user privacy.</p>
          <a class="btn btn-outline-brand" href="/identity/prebid-identity">View Docs</a>
        </div>
      </div>
      <div class="card text-center">
        <div class="card-body">
          <div class="card-media"><img src="/assets/images/icon__product--prebid-server.svg" alt="Prebid Sales Agent Icon"></div>
          <div class="card-title"><h3>Prebid Sales Agent</h3></div>
          <p class="mb-4">Expose inventory to AI agents with AdCP-ready workflows.</p>
          <a href="https://github.com/prebid/prebid-server" class="btn btn-outline-brand">Setup Prebid Sales Agent</a>
        </div>
      </div>
    </div>

[patmmccann]

works for me