DevX Cleanup - Quality of life improvements

[sragss]

• echo-control and echo-server should have exactly one .env and one Dockerfile
• integration-tests/ should be pruned to only what is necessary, expect a 80% reduction in testcount
• integration-test/ should spin up via docker-compose.yml in root
• integration-test/ spinup should build echo-control exactly once rather than via echo-server (built for Primsa) and echo-control
• review package.json files and prune all unnecessary scripts
• integration test vars that are not private should be hardcoded not in .env
• ensure .env.example are correct

[linear]

MERIT-89 Pre-release cleanup

• echo-control and echo-server should have exactly one .env and one Dockerfile
• integration-tests/ should be pruned to only what is necessary, expect a 80% reduction in testcount
• integration-test/ should spin up via docker-compose.yml
• integration-test/ spinup should build echo-control exactly once rather than via echo-server (built for Primsa) and echo-control
• review package.json files and prune all unnecessary scripts

[rsproule]

We should also be sharing types between sdk and the control plane prisma. take advantage of monorepo

[sragss]

Running list of DevX improvements:

• pnpm dev in root
• Allow adding balance in localhost
• Non-sensitive .env.local can be committed