generate a compiled version of miniflare

[threepointone]

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We currently install miniflare as a dependency. However, it makes the install much slower, and bloats up the bundle a little bigger than it has to be. Instead, we should generate a bundled version of it (much like we already do for wrangler) and ship that. This would make installs a lot faster, and the dependency tree much smaller.

[cameron-robey]

Going to wait until open source runtime implemented https://github.com/cloudflare/wrangler2/issues/1637

[penalosa]

Closing this for now, as local development is undergoing changes related to the open-sourcing of the Workers runtime. We'll revisit this in the future, and consider whether this is a direction we want to go in for Miniflare v3 (especially considering how required workerd as a dependency will affect the bundle size)