feat(server/v2): init the indexer in server/v2 (partial backport #22218)

[mergify]

Description

Closes: #22217

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• reviewed state machine logic, API design and naming, documentation is accurate, tests and test coverage

Summary by CodeRabbit

• New Features

  • Introduced a new method for schema decoding, enhancing the application’s ability to handle module data.
  • Added indexing functionality to improve data retrieval and management in the server.
  • Updated configuration settings to include new indexer options.

• Bug Fixes

  • Removed outdated listener management to streamline consensus operations.

• Chores

  • Updated dependencies to ensure compatibility and improve overall performance.

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This is an automatic backport of pull request #22218 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of e84c0eb has failed:

On branch mergify/bp/release/v0.52.x/pr-22218
Your branch is up to date with 'origin/release/v0.52.x'.

You are currently cherry-picking commit e84c0eb86.
  (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:   server/v2/cometbft/abci.go
	modified:   server/v2/cometbft/config.go
	modified:   tools/confix/data/v2-app.toml

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   runtime/v2/app.go
	deleted by us:   runtime/v2/go.mod
	deleted by us:   schema/indexer/start.go
	both modified:   server/v2/cometbft/go.mod
	both modified:   server/v2/cometbft/go.sum
	both modified:   server/v2/cometbft/server.go
	deleted by us:   server/v2/config.go
	deleted by us:   server/v2/go.mod
	deleted by us:   server/v2/go.sum
	deleted by us:   server/v2/types.go
	both modified:   simapp/v2/go.mod
	both modified:   simapp/v2/go.sum

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

[github-actions]

@mergify[bot] your pull request is missing a changelog!

[julienrbrt]

I'll fix the conflicts here.