Add ClipFarm frontend setup and visual showcase pages

[skyrey1234-pixel]

Why

The goal is to make the ClipFarm account setup tangible, not just documented, so you can quickly evaluate visual direction, account structure, and sample clip presentation before scaling account creation.

What changed

This adds two new frontend surfaces under site/examples/:

• clip-farm-accounts/: a setup blueprint page with account architecture, posting cadence, launch checklist, and concrete account examples.
• clip-farm-showcase/: visual mock pages that show the intended vibe and layout in realistic account contexts.

The showcase includes:

• tiktok-music.html (TikTok account mock)
• instagram-sports.html (Instagram reels mock)
• network-board.html (16-account overview board)
• shared styling in styles.css
• embedded example media copied from ClipFarmBot output (music-01.mp4, sports-01.mp4, entertainment-01.mp4)

Notes for reviewers

• This is a static frontend/content addition only, with no runtime logic changes.
• The pages are designed for quick visual iteration and can be expanded to additional niche-specific mock pages if needed.

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[mikekangdev]

What this PR does

This PR adds the ClipFarm frontend surfaces under site/examples/ — the clip-farm-accounts setup blueprint and the clip-farm-showcase mock pages (tiktok-music.html, instagram-sports.html, network-board.html) with shared styling and embedded sample media. It's static content with no runtime logic, so the risk footprint is low and this looks good to merge. Before that, though, I'd tighten up accessibility: tiktok-music.html (and the other showcase pages) starts with main > aside without a preceding header/nav landmark, and the video elements have no title/aria-label to describe their content for screen reader users. Worth a follow-up pass on semantic structure and video alt text.