docs(rosetta): add Rosetta documentation page

[noandrea]

Description

Closes: #9575

Add Rosetta documentation

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[robert-zaremba]

Adding @anilcse as a reviewer - he was integrating Rosetta in our test net so just to verify if all information is there.

[ryanchristo]

A few minor suggestions.

[anilcse]

LGTM. Can we add app.toml settings as well? Might be useful for people who are migrating from old versions

[orijbot]

Visit https://dashboard.github.orijtech.com?pr=9688&repo=cosmos%2Fcosmos-sdk to see benchmark details.

[jgimeno]

LGTM. Can we add app.toml settings as well? Might be useful for people who are migrating from old versions

If I am not mistaken the config via toml was not included in the last version. @fdymylja

[ryanchristo]

Looking good! The location is a bit problematic.

The current location of this document is in the root level and it's not accessible using the sidebar.

This should merged with the existing rosetta documentation in the run-nodes directory.

[robert-zaremba]

@ryanchristo - could you push the updates yourself and merge?