feat(x/ecocredit): buy/sell query server

[ryanchristo]

Description

Closes: #643

Add QueryServer implementation for marketplace query API.

---

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 #645 (47bc1fa) into master (f706392) will increase coverage by 1.34%.
The diff coverage is 91.22%.

❗ Current head 47bc1fa differs from pull request most recent head c1ba100. Consider uploading reports for the commit c1ba100 to get more accurate results

@@            Coverage Diff             @@
##           master     #645      +/-   ##
==========================================
+ Coverage   72.11%   73.45%   +1.34%     
==========================================
  Files         107      107              
  Lines       15212    15876     +664     
==========================================
+ Hits        10970    11662     +692     
+ Misses       3481     3401      -80     
- Partials      761      813      +52     

Flag	Coverage Δ
experimental-codecov	73.58% <91.22%> (+1.34%)	⬆️
stable-codecov	65.80% <91.22%> (+1.91%)	⬆️

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

[ryanchristo]

Currently we are not storing direct buy orders and we have not implemented indirect buy orders (#623), so creating a buy order with Buy does not store a buy order and we have no buy orders to query.

[likhita-809]

can you fix these failing tests @ryanchristo ?

[ryanchristo]

can you fix these failing tests @ryanchristo ?

Just needed to run go mod tidy after merging master. Thanks! Ready for review.

[aleem1314]

LGTM, pre-approving.

Can u also add gRPC REST tests?

[ryanchristo]

Can u also add gRPC REST tests?

Tests added but partially commented out because they are dependent on the creation of buy/sell orders and allowed ask denoms via CLI integration tests and we have not yet implemented CLI commands for marketplace functionality. #615

[likhita-809]

lgtm