refactor(x/ecocredit): clean up ecocredit transaction commads

[ryanchristo]

Description

Ref: #715 / Ref: #1041

This pull request makes the following changes:

• Consistent use of json file for transaction commands (previously some yaml and some json)
• Removes empty argument checks (each transaction command already calls ValidateBasic)
• Updates transaction command integration tests to reuse test values and only test command-specific cases

---

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
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• 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

All items are required. Please add a note if the item is not applicable and please add
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 ! in the type prefix if API or client breaking change
• 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)

[codecov]

Codecov Report

Merging #1199 (7fba245) into master (2800b3c) will decrease coverage by 4.26%.
The diff coverage is 99.14%.

@@            Coverage Diff             @@
##           master    #1199      +/-   ##
==========================================
- Coverage   70.32%   66.06%   -4.27%     
==========================================
  Files         235      236       +1     
  Lines       23976    22358    -1618     
==========================================
- Hits        16862    14770    -2092     
- Misses       5658     6245     +587     
+ Partials     1456     1343     -113     

Flag	Coverage Δ
experimental-codecov	?
stable-codecov	66.06% <99.14%> (+0.99%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

[ryanchristo]

I can break this up if need be. There are still improvements that could be made to the transaction commands, specifically the descriptions and examples, but this pull request is already pretty large so a followup might make more sense.

[ryanchristo]

This was moved outside ecocredit/client so that it could be reused in ecocredits/client/marketplace and ecocredit/client/basket without import issues. Also might be helpful in other parts of the code in the future.

[technicallyty]

nice! good stuff 💪🏻

[aleem1314]

lgtm