Creation of a sample browser

[pkbullock]

• Created first iteration of the site
• it highlights some additional tasks
• putting it into draft for now for earlier preview and happy for feedback.
• Tasks remaining:
• full sample preview
• GitHub actions
• colour theme (maybe based on Copilot Colours),
• data tidy up on some samples, some don't have a sample.json file
• setup of GitHub pages branch and settings
• icons
• Clarity tracking
• Cookie notice

This is an astro based site and most generated by Copilot.
References issue #86

--- Copilot Description

This pull request introduces a new Astro-based documentation/catalog site for browsing and contributing Microsoft 365 Copilot sample projects. It sets up the project structure, configuration, and core pages, and implements a dynamic sample browser with search and filter capabilities. The site reads sample metadata from a consolidated JSON file and provides contribution guidelines and stats.

The most important changes are:

Project Setup and Configuration

• Added Astro project scaffolding with Tailwind CSS and TypeScript support, including astro.config.mjs, package.json, and .gitignore for build artifacts and dependencies. [1] [2] [3]
• Configured VSCode settings for recommended extensions and launch configuration to streamline development. [1] [2]

Sample Data Handling

• Implemented src/lib/samples.ts to read, parse, and provide utility functions for sample metadata from a consolidated public/samples.json file.

UI Components and Pages

• Created reusable UI components such as SampleBrowser.astro and LatestSamples.astro for interactive browsing, searching, and filtering of samples. [1] [2]
• Added main site pages: Home, Samples browser, and About/Contributing, with a shared layout and navigation (SiteLayout.astro). [1] [2]

Documentation

• Added comprehensive project documentation in README.md and developer/contributor guidance in AGENTS.md. [1] [2]

Miscellaneous

• Added a placeholder CLAUDE.md referencing AGENTS.md.