chore: prepare v28.4.0

[julienrbrt]

Release Notes

🚀 Highlights

This release includes a few notable bug fixes and features:

• Compatibility with the new Ignite Rollkit App. For easily scaffolding a rollkit app when using Cosmos SDK v0.50.6+
• Improve footgun prevention when scaffolding a chain with clashing store prefixes.
• Preparing work for the new Ignite scaffolding API with the introduction of the xast package.

📝 Changelog

Following an exhaustive list of changes in this release:

Features

• #4108 Add xast package (cherry-picked from #3770)
• #4110 Scaffold a consumer chain with interchain-security v5.0.0.
• #4117, #4125 Support relative path when installing local plugins

Changes

• #3959 Remove app name prefix from the .gitignore file
• #4103 Bump cosmos-sdk to v0.50.6

Fixes

• #3969 Get first config validator using a getter to avoid index errors
• #4033 Fix cobra completion using fishshell
• #4062 Avoid nil scopedKeeper in TransmitXXX functions
• #4086 Retry to get the IBC balance if it fails the first time
• #4096 Add new reserved names module and remove duplicated genesis order
• #4112 Remove duplicate SetCmdClientContextHandler