test: add unit test to catch missing distribution to subsystems faster (#2495)

* test: add unit test to catch missing distribution to subsystems faster

* add a simple count

* introduce proc macro to generate dispatch type

* refactor

* refactor

* chore: add license

* fixup unit test

* fixup merge

* better errors

* better fmt

* fix error spans

* better docs

* better error messages

* ui test foo

* Update node/subsystem/dispatch-gen/src/lib.rs

Co-authored-by: Bastian Köcher <[email protected]>

* Update node/network/bridge/src/lib.rs

Co-authored-by: Bastian Köcher <[email protected]>

* Update node/subsystem/Cargo.toml

Co-authored-by: Bastian Köcher <[email protected]>

* Update node/subsystem/dispatch-gen/src/lib.rs

Co-authored-by: Bastian Köcher <[email protected]>

* Update node/subsystem/dispatch-gen/src/lib.rs

Co-authored-by: Bastian Köcher <[email protected]>

* Update node/network/bridge/src/lib.rs

Co-authored-by: Andronik Ordian <[email protected]>

* fix compilation

* use find_map

* drop the silly 2, use _inner instead

* Update node/network/bridge/src/lib.rs

Co-authored-by: Andronik Ordian <[email protected]>

* Update node/subsystem/dispatch-gen/src/lib.rs

Co-authored-by: Bastian Köcher <[email protected]>

* nail deps down

* more into()

* flatten

* missing use statement

* fix messages order

Co-authored-by: Bastian Köcher <[email protected]>
Co-authored-by: Andronik Ordian <[email protected]>