We don't want the zeta predictions entry to show in the assistant
context editor when completing slash commands. Zeta will still make
suggestions in the rest of the context editor, like the other providers
do.
Release Notes:
- N/A
This PR extracts the `ContextEditor` to the `assistant_context_editor`
crate.
As part of this, we have decoupled the `ContextEditor` from the
`AssistantPanel`.
There is now an `AssistantPanelDelegate` that the `ContextEditor` uses
when it needs to interface with the Assistant panel.
Release Notes:
- N/A
This PR adds a new `assistant_context_editor` crate.
This will ultimately house the `ContextEditor` so that it can be
consumed by both `assistant` and `assistant2`.
For the purposes of this PR, we just introduce the crate and move some
supporting constructs to it, such as the `ContextStore`.
Release Notes:
- N/A
