[`polling-controller`] `network-controller` should be a direct dependency, not a peer dependency

`polling-controller` seems to only use types from `network-controller` and does not talk to this controller. Therefore, its dependency on `network-controller` should be defined under `dependencies`, not `devDependencies` + `peerDependencies`.

Fixing this would reduce the number of packages that need to be released if a major version of `network-controller` is released.

Start in the polling-controller package configuration and inspect how network-controller is currently declared under devDependencies and peerDependencies. Confirm the package only uses its types, then update the dependency declarations so network-controller is a direct dependency and verify the package metadata and release relationship are correct.

Written by the indexing model from the issue text.