docs: runtime docs (backport #22816)

[mergify]

Description

Closes: #21429

I think we can consider the last part of the documentation update for v0.52.
Putting runtime as the preferred way to build an app. It will help to explain the migration to v2 as it will be runtime -> runtime/v2

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Summary by CodeRabbit

• Documentation
  • Enhanced documentation for the depinject framework, including a beta disclaimer and expanded usage examples.
  • Updated and clarified the runtime package documentation, emphasizing its role in managing blockchain applications.
  • Restructured content in 01-app-go-di.md to align with the latest Cosmos SDK version, focusing on module configuration and wiring.
  • Updated version references and links in 12-simulation.md to reflect the latest changes in the SimApp class.
  • Minor comment updates in runtime/v2/app.go for improved clarity on example setups.
  • Significant revisions to 00-app-anatomy.md to enhance clarity on application structure and module integration.

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This is an automatic backport of pull request #22816 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of aa8266e has failed:

On branch mergify/bp/release/v0.52.x/pr-22816
Your branch is up to date with 'origin/release/v0.52.x'.

You are currently cherry-picking commit aa8266e70.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   docs/build/building-apps/00-runtime.md
	modified:   docs/build/building-apps/01-app-go-v2.md
	modified:   docs/learn/advanced/12-simulation.md
	modified:   docs/learn/beginner/00-app-anatomy.md
	deleted:    simapp/app_di.go
	deleted:    simapp/simd/cmd/root_di.go
	renamed:    simapp/v2/app_di.go -> simapp/v2/app.go
	renamed:    simapp/v2/simdv2/cmd/root_di.go -> simapp/v2/simdv2/cmd/root.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   depinject/README.md
	deleted by us:   runtime/v2/app.go
	both added:      simapp/app.go
	both added:      simapp/simd/cmd/root.go

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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