* Do a small write-up on collation-generation
* preamble to collator protocol
* notes on protocol
* collation-generation: point to collator protocol
* fix missing bracket
* expand on collator protocol wire protocol
* add a couple more sentences
* expand on requests some more
* go higher level
* network bridge: note peerset
* note peer-set = validation for protocols
* add `ConnectToValidators` message
* use ConnectToValidators in collator protocol
* typo
* remove references to sentry nodes
* guide: optimize diagrams for readability
* guide: inclusion subsystem diagram
* guide: rename Approval Subsystem for clarity
* guide: correct the approval subsystem
* guide: clarify that validator are selected from the same set
* guide: simplify secondary checkers labels