Closes: #603

Description

• Migration to Cosmos SDK v0.46
• preliminary oracle tx prioritization
• upgrade handlers
• integrated new modules: nft, gov
• bump IBC to v3.1
• few cleanups

NOTES

• I'm using replace to deal with dependencies we had to migrate. In order to build the app, you need to clone our forks of Gravity Bridge, IBC and bech32ibc next to the umee repo.

TODO:

• migrate tests

Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• added appropriate labels to the PR
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

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your handle next to the items reviewed if you only reviewed selected items.

I have...

• confirmed the correct type prefix in the PR title
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)