chore: Fix up actions and pre-commit (#10)

Uses terraform_docs directly to generate inputs/outputs, and drops the GHA workflow as it doesn't work anymore

Author: gaima8

.github/CODEOWNERS

@@ -1,12 +1,17 @@
+---
 repos:
-  - repo: https://github.com/mineiros-io/pre-commit-hooks
-    rev: v0.4.1
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v6.0.0
     hooks:
-      - id: terraform-fmt
-      - id: terraform-validate
-        exclude: ^examples|.terraform/
-      - id: tflint
-      - id: phony-targets
-      - id: terradoc-validate
-      - id: terradoc-fmt
-      - id: terradoc-generate
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: mixed-line-ending
+  - repo: https://github.com/antonbabenko/pre-commit-terraform
+    rev: v1.89.0
+    hooks:
+      - id: terraform_fmt
+      - id: terraform_tflint
+      - id: terraform_docs
+        args:
+          - --hook-config=--add-to-existing-file=true
+      - id: terraform_validate