fix: replace latest-version with a single fetch request

[outslept]

Since we don't configure any private registries or authentication, we don't need the latest-version dependency that pulls in 16 additional packages for features we don't use. Engines declares node 22.16.0 and fetch became stable around ~21-ish.

Using fast-npm-meta by antfu is a matter of preference. I like it more as it provides basic caching - alternatively, we can make a direct request to https://registry.npmjs.org/@sentry/core/latest which has a slightly larger payload but eliminates any external service dependency.

UPD: npm's rate limiting is described here and it's generous imo https://docs.npmjs.com/policies/open-source-terms#acceptable-use (see number 17).

But to draw one clear line, under no circumstances are five million requests to npm Services in a single month-long period by any single individual, organization, or group of affiliated companies remotely reasonable.