Osmosis swaps UX and bug fixes

[sug0]

Describe your changes

Requires #4722 to be deployed in production alongside/before this PR, otherwise the client code of Osmosis swaps will be broken

• Added ability to confirm/reject trades in the SDK, based on the returned pool route and slippage
• Compute minimum output from slippage percentage when shielding the output of the trade
• Reworked the SDK/CLI args, to remove the need of providing an Osmosis REST API RPC endpoint (a default one is used)
• Added default slippage percentage of 0.5%, when it is unspecified in the CLI/SDK
• Made the SDK always compute the min output of the trade, based on the /quote endpoint of Osmosis SQS
• Fixed a bug with Cosmos SDK chains not being able to parse the bech32m encoding of the MASP address (requires Allow bech32 encoding of MASP address in shielded receive middleware #4722)

Checklist before merging

• If this PR has some consensus breaking changes, I added the corresponding breaking:: labels
  • This will require 2 reviewers to approve the changes
• If this PR requires changes to the docs or specs, a corresponding PR is opened in the namada-docs repo
  • Relevant PR if applies:
• If this PR affects services such as namada-indexer or namada-masp-indexer, a corresponding PR is opened in that repo
  • Relevant PR if applies: