Add basic coveralls.io support

[Zain-Mahmoud]

Summary

This PR aims to add coveralls.io support to report test code coverage. Coveralls works by reading a coverage report produced after running the tests and uploads it to coveralls.io. This is our repo link on coveralls: https://coveralls.io/github/cssu/terrain-diffusion. You can see the changes for this PR under pull #52

Validation

• scripts/quality-check.sh passes locally
• Appropriate /test commands were run and are passing (e.g. /test gpu)
• Unit tests were added / e2e tests were added where applicable
• Manual testing, if applicable (describe further):

Checklist

• The change is focused and easy to review.
• Tests were added or updated for behaviour changes.
• No secrets, generated files, or files that only make sense on my machine are included.
• Relevant documentation is updated.

Additional Comments

[Zain-Mahmoud]

/test all

[github-actions]

Tests passed

• Groups run: python, slow, web
• Commit tested: c59c9d9
• Full log: Actions run

Group	Result
python	41/41 passed
slow	0/0 passed
web	1/1 passed

[coveralls]

Coverage Report for CI Build 32306386273

Warning

No base build found for commit 295f55d on main.
Coverage changes can't be calculated without a base build.
If a base build is processing, this comment will update automatically when it completes.

Coverage: 96.765%

Details

• Patch coverage: No coverable lines changed in this PR.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

Requires a base build to compare against. How to fix this →

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Coverage Stats

Relevant Lines:	340
Covered Lines:	329
Line Coverage:	96.76%
Coverage Strength:	0.97 hits per line

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💛 - Coveralls