Adds a "choose-type" step to the settings flow so users can pick between
Honcho Cloud (https://api.honcho.dev, API key required) and Self-Hosted
(URL + optional token) when creating a connection. Multi-instance support
already exists in the data layer, so cloud and self-hosted instances can
coexist.
- new HONCHO_CLOUD_URL constant and isCloudInstance helper in config.ts
- SettingsForm accepts a preset prop; cloud variant locks the endpoint
and enforces an API key
- InstancesManager gains a ConnectionTypeChooser entry point and renders
a Cloud icon for cloud instances in the list
- unit tests for both preset paths and cloud edit-mode detection
f0717624eb