* feat: Create provisioner abstraction
Creates a provisioner abstraction that takes prior art from the Terraform plugin system. It's safe to assume this code will change a lot when it becomes integrated with provisionerd.
Closes#10.
* Ignore generated files in diff view
* Check for unstaged file changes
* Install protoc-gen-go
* Use proper drpc plugin version
* Fix serve closed pipe
* Install sqlc with curl for speed
* Fix install command
* Format CI action
* Add linguist-generated and closed pipe test
* Cleanup code from comments
* Add dRPC comment
* Add Terraform installer for cross-platform
* Build provisioner tests on Linux only
