feature: declarative support update from service #5739
Description
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Describe the requested feature
when we design a component, it may receive value update from a service.
or in general case, https://docs.flet.dev/cookbook/declarative-vs-imperative-crud-app/#3-pageupdate-everywhere-nowhere
when we replace page.update(), we can't replace
page.horizontal_alignment = ft.CrossAxisAlignment.CENTER
page.appbar = ft.AppBar(title=ft.Text("flet sherpa onnx"), center_title=True)
fso_service = fso.FletSherpaOnnx()
page._services.append(fso_service)
which causes page still a dependency of component and further cause error.
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