Update README.md to left-align paragraphs

[maltsev-dev]

Changed paragraph alignment from center to left in README.

What

Why

How

Test plan

• Unit tests pass (per-repo, e.g. cd backend && cargo test, cd frontend && npm test)
• Lint passes (per-repo, e.g. cd frontend && npm run lint)
• Type-check passes (per-repo, e.g. cd frontend && npm run type-check)
• Manually verified in dev / staging

Risk

Checklist

• I have read the repo's CONTRIBUTING.md (if present)
• My change does not introduce new lint warnings
• I have updated the CHANGELOG (if user-visible)
• I have considered backwards compatibility

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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