ci: add commitlint action

To check that commits are according to the Conventional Commits spec.
https://www.conventionalcommits.org/en/v1.0.0/

.commitlintrc.yaml

@@ -1,28 +0,0 @@
----
-# The rules below have been manually copied from @commitlint/config-conventional
-# and match the v1.0.0 specification:
-# https://www.conventionalcommits.org/en/v1.0.0/#specification
-#
-# You can remove them and uncomment the config below when the following issue is
-# fixed: https://github.com/conventional-changelog/commitlint/issues/613
-#
-# extends:
-#   - '@commitlint/config-conventional'
-rules:
-  body-leading-blank: [1, always]
-  body-max-line-length: [2, always, 100]
-  footer-leading-blank: [1, always]
-  footer-max-line-length: [2, always, 100]
-  header-max-length: [2, always, 100]
-  subject-case:
-    - 2
-    - never
-    - [sentence-case, start-case, pascal-case, upper-case]
-  subject-empty: [2, never]
-  subject-full-stop: [2, never, "."]
-  type-case: [2, always, lower-case]
-  type-empty: [2, never]
-  type-enum:
-    - 2
-    - always
-    - [build, chore, ci, docs, feat, fix, perf, refactor, revert, style, test]

.github/workflows/commitlint.config.js

@@ -0,0 +1,3 @@
+export default {
+  extends: ["@commitlint/config-conventional"],
+};

.github/workflows/lint-pr.yml

@@ -14,7 +14,10 @@ jobs:
 
       - run: >-
           npx
+          --package @commitlint/cli
+          --package @commitlint/config-conventional
           commitlint
+          -g .github/workflows/commitlint.config.js
           --from ${{ gitea.event.pull_request.base.sha }}
           --to ${{ gitea.event.pull_request.head.sha }}
           --verbose