Warn when compose wait strategy names don't match containers

[cristianrgreco]

Summary of changes

• Add a warning in DockerComposeEnvironment.up() when withWaitStrategy(...) names do not match any started containers.
• Keep behavior non-breaking: unmatched entries are still ignored, but now produce a clear warning explaining container-name matching.
• Add an integration test that verifies the warning is emitted for an unmatched wait strategy key.
• Update compose docs to clarify that:
  • .up([...]) takes service names
  • .withWaitStrategy(...) takes container names (for example <service>-1 in Compose v2)

Verification commands run

• npm run format
• npm run lint
• npm test -- packages/testcontainers/src/docker-compose-environment/docker-compose-environment.test.ts -t "should warn when no started containers match configured wait strategy names"

Test results summary

• Formatting and linting completed successfully.
• Targeted Docker Compose integration test passed (1 passed, 24 skipped).

Closes #837

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