Constrain hero neon scan to the word "programming" and slow it to 2.4s x2

[Gonza10V]

Motivation

• Reduce visual distraction by targeting the neon scan animation to the single word "programming" in the hero headline.
• Adjust the timing so the scan is slower and performs two left-to-right passes for a subtler emphasis.

Description

• Wrap the word programming in a dedicated <span class="hero-neon-text" data-hero-neon> and remove the neon class from the whole <h1> so only that word is animated (src/pages/index.astro).
• Update the headline classes to preserve sizing and line-height while allowing the inline animation target (src/pages/index.astro).
• Make .hero-neon-text an inline block and change the .hero-neon-text--active animation to 2.4s with 2 iterations so it runs twice and slower (src/styles/global.css).
• Flip the @keyframes hero-neon-scan start/end background-position values so the visual sweep travels left-to-right across the word (src/styles/global.css).

Testing

• Ran pnpm format:check and formatting passed successfully.
• Ran pnpm build (Astro build) and the site built with no errors.
• Ran pnpm typecheck / astro check and there were no diagnostics errors.
• Ran pnpm lint (ESLint) and there were no lint errors.

---

Codex Task