Add the pre-commit hooks from the docs-spec-template repository

This will ensure consistent line endings and valid yaml/json.
Can be enabled using `pre-commit install`.

Author: arichardson

.github/workflows/pre-commit.yml

@@ -0,0 +1,15 @@
+---
+name: pre-commit
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+      - uses: pre-commit/[email protected]

.pre-commit-config.yaml

@@ -0,0 +1,26 @@
+---
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: check-json
+      - id: check-symlinks
+      - id: check-yaml
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+        args: [--markdown-linebreak-ext=md]
+
+  - repo: local
+    hooks:
+      - id: forbidden-file-extensions
+        name: forbidden-file-extensions
+        entry: disallow these file extensions
+        language: fail
+        # Disallow other asciidoc extensions except .adoc
+        files: .*\.(asciidoc|asc)$
+
+  - repo: https://github.com/jumanjihouse/pre-commit-hook-yamlfmt
+    rev: 0.2.3
+    hooks:
+      - id: yamlfmt
+        args: [--mapping, '2', --sequence, '4', --offset, '2']