Implement Osmosis shielded swaps

[sug0]

Describe your changes

Based on #4134

Implement client code to perform shielded swaps.

Diff: https://github.com/anoma/namada/compare/bat+tiago/feat/ibc-pfm-with-invalid-addrs..tiago/osmosis-swap-cli-over-v44

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:

[codecov]

Codecov Report

Attention: Patch coverage is 52.80289% with 261 lines in your changes missing coverage. Please review.

Project coverage is 74.48%. Comparing base (cc531ec) to head (28c5e3e).
Report is 79 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/ibc/src/context/middlewares/pfm_mod.rs	52.63%	180 Missing ⚠️
crates/sdk/src/args.rs	0.00%	67 Missing ⚠️
crates/ibc/src/context/token_transfer.rs	63.63%	8 Missing ⚠️
crates/ibc/src/context/nft_transfer_mod.rs	33.33%	2 Missing ⚠️
crates/ibc/src/context/transfer_mod.rs	33.33%	2 Missing ⚠️
crates/ibc/src/lib.rs	88.23%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4133      +/-   ##
==========================================
- Coverage   74.58%   74.48%   -0.11%     
==========================================
  Files         341      343       +2     
  Lines      107484   108011     +527     
==========================================
+ Hits        80167    80450     +283     
- Misses      27317    27561     +244     

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