Closes#675.
BREAKING CHANGE: an outbox message PDA is now derived from the emitting program
as well as the destination zone and ordinal, and the seed domain moves to
/00001/, so every outbox record address changes. `OutboxRecord` gains `emitter`
and `ordinal`, changing its borsh layout, so records written by earlier code are
orphaned at their old addresses and no longer decode. A second `Emit` at the same
(emitter, target_zone, ordinal) now fails the transaction instead of silently
overwriting the record, so a caller must choose an ordinal the chain does not
already hold rather than counting from zero. A fresh genesis is required.
Integrates origin/main (per-program-crate refactor) and re-homes the cross-zone messaging feature onto it.
BREAKING CHANGE: Genesis state root changes. This registers six builtin programs
(cross_zone_outbox, cross_zone_inbox, ping_sender, ping_receiver, bridge_lock,
wrapped_token) and seeds their genesis accounts (the wrapped_token authorized
minter config, the per-zone inbox config, and optional bridge-lock holdings).
Building the new cores alongside the existing builtins also enables serde/alloc
for the shared programs build, regenerating every builtin program image id. All
nodes must upgrade together.
Artem Gureev