* Remove TargetedMessage

* Nitpicks

* CI: Split common functions into lib.sh and make...

... alert_pending_release.sh check the substrate changes for various
labels. If labelled, will be included in the changelog, otherwise will
silently be left out.

* replace non-standard /bin/bash with /usr/bin/env bash

* CI: make lib.sh /bin/sh-compatible

* WIP

* WIp

* Mostly get tests to compile

* Fix adder collator

* Remove more stuff

* Revert some changes to av store

* Fix av store tests

* Nitpicks

* Restore some things

* Small changes

* Remvoe unused error variants

* Revert e2dc9371

* Make it work

* add a maximum code size and head data size

* get existing tests passing

* add tests for slots logic

* test registrar behavior

* introduce maximums and bump versions

* address review grumbles

* work around publicizing derive

* remove unneeded and wrong doc