feat(x/ecocredit): query all projects with pagination

[ryanchristo]

Description

Ref: #1137

The pull request adds a query for all projects regardless of credit class with pagination.

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Author Checklist

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I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
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• 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
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Reviewers Checklist

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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)

[ryanchristo]

Pending #1168

[codecov]

Codecov Report

Merging #1178 (421ee9f) into master (b90aa21) will increase coverage by 0.14%.
The diff coverage is 94.50%.

@@            Coverage Diff             @@
##           master    #1178      +/-   ##
==========================================
+ Coverage   69.39%   69.54%   +0.14%     
==========================================
  Files         220      221       +1     
  Lines       22859    23060     +201     
==========================================
+ Hits        15864    16036     +172     
- Misses       5621     5642      +21     
- Partials     1374     1382       +8     

Flag	Coverage Δ
experimental-codecov	69.62% <94.50%> (+0.16%)	⬆️
stable-codecov	64.01% <94.50%> (+0.23%)	⬆️

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[aleem1314]

lgtm

[technicallyty]

lgtm