Add CLI/wasmbinding to set tokenfactory metadata

[codchen]

Describe your changes and provide context

The CLI allow passing in a JSON file, and the wasmbinding takes in a json blob with the same format

Testing performed to validate your change

local sei

[codecov]

Codecov Report

Merging #989 (ad4a82f) into main (c071491) will decrease coverage by 1.06%.
Report is 2 commits behind head on main.
The diff coverage is 6.94%.

❗ Current head ad4a82f differs from pull request most recent head 1198c0f. Consider uploading reports for the commit 1198c0f to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #989      +/-   ##
==========================================
- Coverage   63.93%   62.88%   -1.06%     
==========================================
  Files         254      256       +2     
  Lines       16234    16497     +263     
==========================================
- Hits        10380    10374       -6     
- Misses       5349     5615     +266     
- Partials      505      508       +3     

Files Changed	Coverage Δ
x/tokenfactory/client/cli/tx.go	2.79% <6.94%> (ø)

... and 5 files with indirect coverage changes

[yzang2019]

Can we add an integration test for this new CLI command if it's not too complex?