feat: add utility modules (TC-2)

[leonardo1229]

Adds a set of utility modules used across the application. Fixes #2

[watchflow-dev-leonardo]

🛡️ Watchflow Governance Checks

Status: ❌ 1 Violations Found

🟡 Medium Severity (1)

Validates that total lines changed (additions + deletions) in a PR do not exceed a maximum; enforces a maximum LOC per pull request.

Pull request exceeds maximum lines changed (1019 > 500)
How to fix: Reduce the size of this PR to at most 500 lines changed (additions + deletions).

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[leonardo1229]

/risk

[watchflow-dev-leonardo]

🛡️ Watchflow: Risk Assessment

Risk Level: 🟡 Medium (score: 4)
Files Changed: 31

Risk Signals:

• Moderate changeset — 31 files changed (+1 pts)
• Significant lines changed — 1019 lines added/removed (+1 pts)
• No test coverage — Code changes without test files (+2 pts)

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