feat: referral split impl

[Jabolol]

This pull request includes several changes to improve the workflow and enhance the metrics computation logic. The most important changes include adding a manual trigger to the GitHub workflow, modifying the computeWeights function to handle referrer logic, and ensuring valid wallet addresses in the fetchMetricsForPool function.

Workflow Enhancements:

• .github/workflows/distribution.yml: Added workflow_dispatch to allow manual triggering of the workflow.

Metrics Computation Enhancements:

• packages/sdk/src/metrics/computeWeights.ts: Updated the computeWeights function to handle referrer logic, including fetching referrer details from the database and adjusting share percentages accordingly.

Data Validation:

• packages/sdk/src/metrics/fetchMetricsForPool.ts: Ensured only valid wallet addresses are processed by filtering the pool data using the isAddress function.

Codebase Simplification:

• packages/sdk/src/metrics/fetchMetricsForPool.ts: Imported the isAddress function from the viem library to validate wallet addresses.

Minor Cleanup:

• .github/workflows/distribution.yml: Removed the version parameter for the pnpm/action-setup action.