fix: normalize copeland score with voting power

[ChaituVR]

Related to. https://github.com/snapshot-labs/workflow/issues/281

This PR normalizes copeland score with voting power by allocating power to each choice with their copeland score

How to test

• Just trust me bro (most of it is generated by AI)

[Copilot]

PR Overview

This PR fixes the Copeland score calculation by normalizing it with voting power, ensuring that the score distribution reflects the actual vote balances. Key changes include:

• Adding helper functions to generate examples with decimal and high voting powers.
• Updating the core scoring logic in copeland.ts to normalize scores against the total voting power.
• Extending test coverage in copeland.spec.js to verify normalization across various voting power scenarios.

Reviewed Changes

File	Description
src/voting/copeland.spec.js	Added test cases and helper functions to test normalization.
src/voting/copeland.ts	Modified Copeland score computations to normalize voting power.

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (2)

src/voting/copeland.ts:107

• Floating point precision issues may arise during normalization. Consider implementing a rounding strategy or using a fixed precision method when distributing voting power.

totalCopelandScore = scores.reduce((sum, score) => sum + score, 0);

src/voting/copeland.ts:130

• [nitpick] For clarity, consider renaming 'strategyTotals' to 'totalVotingPowerPerStrategy' to better reflect its purpose.

const strategyTotals = Array(strategiesCount).fill(0);

[bonustrack]

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