feat(test): add hatch scripts and docs for coverage reports

[LalatenduMohanty]

Add coverage lifecycle scripts (coverage-erase, coverage-combine, coverage-report) and document how to generate a combined coverage report that includes both unit and e2e tests.

Related to #1033

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between c5c3afc and 7c49d1e.

📒 Files selected for processing (3)

• .gitignore
• docs/develop.md
• pyproject.toml

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📝 Walkthrough

Walkthrough

This pull request enhances coverage report generation by introducing timestamped file storage. The changes add a .gitignore pattern to exclude generated coverage reports, implement three new Hatch scripts (coverage-erase, coverage-combine, and an updated coverage-report that writes to a timestamped file via tee), and document the complete workflow for generating combined unit and e2e coverage reports.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main changes: adding hatch scripts for coverage operations and documenting how to use them for combined coverage reports.
Description check	✅ Passed	The description clearly relates to the changeset by summarizing the coverage scripts added and the documentation provided, with a reference to the related issue.

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[rd4398]

This looks good!
Thanks