initial implementation: terraform-provider-encapi

Terraform/OpenTofu provider for encapi (the Puppet ENC replacing Cobbler).
- resources: encapi_role (jsonencode default_params), encapi_status, encapi_node
- data sources: encapi_node, encapi_role
- client with bearer-token auth; unit tests; examples
- Makefile (package->zip), Woodpecker CI publishing to the artifactapi
  terraform-unkin registry on tag

.pre-commit-config.yaml

@@ -0,0 +1,15 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v5.0.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+
+  - repo: https://github.com/dnephin/pre-commit-golang
+    rev: v0.5.1
+    hooks:
+      - id: go-fmt
+      - id: go-vet
+      - id: go-mod-tidy