This change removes the hard dependency on `keyv`, allowing the package to be used in environments where `keyv` is not available, such as Cloudflare Workers.

To achieve this, `keyv` is now treated as an optional peer dependency. Users who wish to use the persistent caching feature must now install `keyv` themselves and provide the `Keyv` class and a store adapter to the `VRChat` client constructor.

This implementation uses dependency injection to provide the `Keyv` class at runtime, avoiding dynamic imports and ensuring that the dependency is explicit for users of the feature.

Additionally, the `process.on('beforeExit')` hook has been removed, as it is a Node.js-specific API and not available in environments like Cloudflare Workers.

refactor: Make keyv an optional dependency

Removes the `cacheable` and `keyv` dependencies to ensure compatibility with Cloudflare Workers.

The cookie caching mechanism has been replaced with a simple in-memory `Map` to store cookies for the duration of the session. This is a more suitable approach for environments like Cloudflare Workers where persistent file-based caching is not available or desired.

The `keyv` configuration option has been removed from the `VRChat` client, and the example has been updated to reflect this change.

feat: remove keyv dependency

…and publishing

…ript