Release v20.45.0

Makes the sanctioned MobX observer boundary in Cratis Arc React MVVM explicit, documented, and guarded, so consumer apps stop reaching through the transitive MobX dependency or blanket-wrapping components.

Added

• Exported observer from @cratis/arc.react.mvvm so a child component that reads view model observables directly can be given its own observer boundary, with guidance in the React MVVM documentation.
• Added a no-direct-mobx-react-import ESLint rule that flags direct imports from mobx-react / mobx-react-lite and points consumers to @cratis/arc.react.mvvm instead.

Changed

• The recommended Cratis Arc ESLint config now reports direct mobx-react / mobx-react-lite imports as errors.