## Summary
- Introduces Terraform native tests (`terraform test`) alongside
existing Bun tests
- Migrates tests for modules: jetbrains, zed, and code-server
- Removes Bun test files for these migrated modules only
- Adds repo-wide test runner script for Terraform tests
- Updates docs and new-module sample to reflect Terraform tests
## Transition plan
- Mixed mode: Other modules retain Bun tests; CI should run both Bun and
Terraform tests temporarily
- Follow the linked epic to migrate remaining modules
## Test plan
- Run: `./scripts/terraform_test_all.sh` (passes locally)
- Bun tests still available for non-migrated modules
## Affected paths
- registry/coder/modules/jetbrains/jetbrains.tftest.hcl
- registry/coder/modules/zed/zed.tftest.hcl
- registry/coder/modules/code-server/code-server.tftest.hcl
- scripts/terraform_test_all.sh
- examples/modules/MODULE_NAME.tftest.hcl
- CONTRIBUTING.md
Contributes to #308
