Introduce the `rules` module beneath `canonical`. The implementation follows
the Canonical References RIP[^0].
A `Rule` defines the DIDs and threshold required to get the canonical tip
for a reference (or set of references). Since a `Rule` has some specific
validation rules, there can be two versions of a `Rule`. The `RawRule` is one
that can be easily constructed, serialized, and deserialized. It must then be
validated into a `ValidRule`, which validates any constraints, and can be used
in the computing of a canonical tip.
For convenience, a set of `ValidRule`s is wrapped into the `Rules` type, which
also has a further constraint that each rule refers to a specific `refspec`.
[0]: 1d1ce874f7
Prepare the crates for releasing to crates.io:
- radicle-remote-helper: 0.10 -> 0.11
- radicle-term: 0.12 -> 0.13
- radicle-cli: 0.13 -> 0.14
- radicle-node: 0.11 -> 0.12
- radicle-fetch: 0.11 -> 0.12
- radicle: 0.15 -> 0.16
It was also necessary to specify the `version` in the workspace Cargo.toml file,
since this is required for publishing to crates.io.
The `Review::summary` was limited in behaviour, since it was only an
`Option<String>`.
The field is now changed to `NonEmpty<Edit>` so that it can enable an edit
history, as well as being able to supply embeds as part of the text.
`Reactions` are also introduced to `Review` and, necessarily, introducing an
`Action::ReviewReact`.
Note that some machinery was added under `actions` and `encoding` to enable
backwards-compatibility.
For `actions`, a new `ReviewEdit` is introduced to keep
track of the different versions of editing actions – supporting the old actions
while also introducing the new variant.
For `encoding`, the machinery exploits the fact that an `Option<String>` can be
converted into a `NonEmpty<Edit>` given that an `ActorId` and `Timestamp` are
available, and that `None` can be converted into an empty string. The struct
`patch::Review` now deserializes via this `encoding::review::Review` type and,
importantly, preserves backwards-compatibility.