Add Cloudflare Workers/Pages configuration

[Copilot]

Adds wrangler.toml configuration file for Cloudflare Workers/Pages deployments.

Changes

• wrangler.toml: Base configuration with project name, compatibility date, and commented scaffolding for KV namespaces, D1 databases, R2 buckets, routes, and environment overrides
• .gitignore: Exclude .wrangler/ cache directory and .dev.vars local environment file

Configuration enables deployment of examples or documentation to Cloudflare infrastructure. All optional features are commented with inline documentation for easy customization.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Try to add a cloudflare configuration to the repo</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Try to add a cloudflare configuration to the repo #7

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