test: cover init modules and pipeline

[0x76agabond]

Summary

Add focused tests for the modules used by compose init and an integration test for the complete init pipeline.

Changes Made

• Added focused tests for config, init, preflight, project directory, scaffolding, Diamond generation, deploy generation, and test generation modules.
• Added an InitPipeline test harness using temporary directories and a fixture framework adapter.
• Added pipeline coverage for bare Foundry, bare Hardhat, and minimal ERC-20 projects.
• Updated the CLI workflow to run Vitest in CI.
• Verified 130 CLI tests, TypeScript build, and lint successfully.

Checklist

Before submitting this PR, please ensure:

• Code follows the Solidity feature ban - Not applicable; no Solidity production code was changed.
• Code follows Design Principles - Tests follow the existing module and adapter boundaries.
• Code matches the codebase style - Test files follow the existing CLI test conventions.
• Code is formatted with forge fmt - Not applicable; no Solidity files were changed.
• Existing tests pass - All 130 CLI tests pass.
• New tests are optional - New tests are included.
• All tests pass - npm run cli@test, npm run cli@build, and npm run cli@lint pass.
• Documentation updated - Not applicable; no user-facing behavior changed.
• Changesets - No changeset is required because this PR only adds tests and CI coverage.

Make sure to follow the [contributing](https://compose.diamonds/docs/contribution/how-to-contribute) guidelines.

Additional Notes

Framework installation and real project compilation remain covered by the existing Foundry and Hardhat smoke-test steps in the CLI workflow. The Vitest pipeline tests use a fixture adapter so the regular test suite remains fast and deterministic.

[changeset-bot]

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Latest commit: d0b6334

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