0.3.3 - refine landing motion and responsive layout

[abelmaro]

Summary

• Add the public MemoRepo landing page and GitHub Pages deployment workflow.
• Add accessible, one-time landing animations with reduced-motion support.
• Refine navigation offsets, responsive alignment, architecture paths, and mobile dashboard presentation.
• Expand browser coverage across Chromium, Firefox, and WebKit.
• Prepare package versions and changelog for 0.3.3.

Motivation and context

Publish a polished responsive product landing page with calm motion, reliable anchor navigation, and stable rendering across supported viewport sizes and orientations.

Changes

• Added the Astro landing application and Motion choreography.
• Improved card, icon, architecture, documentation, and dashboard alignment.
• Added responsive, orientation, accessibility, interaction, and reduced-motion browser checks.
• Configured GitHub Pages validation and deployment from main.

Validation

• pnpm --filter @memorepo/landing typecheck
• pnpm --filter @memorepo/landing build
• pnpm --filter @memorepo/landing test:unit
• pnpm --filter @memorepo/landing test:browser
• Visual validation completed for desktop, tablet, and mobile layouts in portrait and landscape.

Screenshots or recordings

Visual validation was completed against the requested responsive layouts and supplied references.

Compatibility, security, and documentation

• Compatibility or migration impact: None.
• Security or privacy impact: None.
• Documentation impact: Landing documentation and release changelog updated.

Checklist

• The change is limited to one coherent outcome.
• Tests cover new and changed behavior.
• Public documentation is updated.
• No credentials, private data, local paths, local state, or generated artifacts are included.
• Breaking changes and operational risks are identified.