[DEV] Introduce ElmishProgram wrapper lifecycle

[lukaszkrzywizna]

Summary

• replace the post-map style debugger integration with an ElmishProgram setup/run wrapper
• keep the prepared program immutable from the outside while storing runtime state in closures
• add convenience createStore helpers so callers can choose split or simple store creation

Validation

• dotnet build ElmishStore.sln
• dotnet fable ./src/ElmishStore.Example --define DEBUG --outDir ./src/ElmishStore.Example/.fable-build
• manual browser smoke on http://localhost:8080 with mocked Redux DevTools jump-to-state and jump-to-action

[lukaszkrzywizna]

explain that change

[lukaszkrzywizna]

There is an official fable 5 already published.

[lukaszkrzywizna]

Do we still need postcss for tailwind 4?

[lukaszkrzywizna]

if empty then just remove it