ci: add yamllint and PR title check

Add some basic enforcement of yaml in the repo and that PRs have a good
description for making a release cadence.

.github/pr-title-checker-config.json

@@ -0,0 +1,15 @@
+{
+    "LABEL": {
+      "name": "title needs formatting",
+      "color": "EEEEEE"
+    },
+    "CHECKS": {
+      "prefixes": ["[Bot] docs: "],
+      "regexp": "^(feat|fix|docs|test|ci|chore)!?(\\(.*\\))?!?:.*"
+    },
+    "MESSAGES": {
+      "success": "PR title is valid",
+      "failure": "PR title is invalid",
+      "notice": "PR Title needs to pass regex '^(feat|fix|docs|test|ci|chore)!?(\\(.*\\))?!?:.*"
+    }
+  }

.github/workflows/pr-title-check.yaml

@@ -0,0 +1,29 @@
+name: "Lint PR"
+
+on:
+  pull_request_target:
+    types: [opened, edited, reopened, synchronize]
+
+# IMPORTANT: No checkout actions, scripts, or builds should be added to this workflow. Permissions should always be used
+# with extreme caution. https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#pull_request_target
+permissions: {}
+
+# PR updates can happen in quick succession leading to this
+# workflow being trigger a number of times. This limits it
+# to one run per PR.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+
+
+jobs:
+  validate:
+    permissions:
+      contents: read
+      pull-requests: read
+    name: Validate PR Title
+    runs-on: ubuntu-latest
+    steps:
+      - uses: thehanimo/pr-title-checker@0cf5902181e78341bb97bb06646396e5bd354b3f # v1.4.0
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          configuration_path: ".github/pr-title-checker-config.json"

.github/workflows/yamllint.yaml

@@ -0,0 +1,14 @@
+name: Validate Manifests
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  lint-yaml:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: pip install yamllint
+      - run: yamllint -c .yamllint.yaml --format github .

.pre-commit-config.yaml

@@ -0,0 +1,13 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: fix-byte-order-marker
+      - id: mixed-line-ending
+  - repo: https://github.com/adrienverge/yamllint
+    rev: v1.33.0
+    hooks:
+      - id: yamllint
+        args: [-c, .yamllint.yaml]

.yamllint.yaml

@@ -0,0 +1,9 @@
+extends: default
+
+rules:
+  document-start: disable
+  indentation:
+    indent-sequences: whatever
+  line-length: disable
+  truthy:
+    ignore: .github/workflows/