Merge pull request juju#1068 from SimonRichardson/conventional-commits

juju#1068

#### Description

Use linting to ensure proper commit messages. This will use the default config out of the box, and we can add more if we feel the need.



#### QA Steps

Ensure that the commits are correctly linted.


Fixes [JUJU-6215](https://warthogs.atlassian.net/browse/JUJU-6215)


[JUJU-6215]: https://warthogs.atlassian.net/browse/JUJU-6215?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

.github/workflows/static-analysis.yaml

@@ -0,0 +1,18 @@
+name: "Static Analysis"
+on:
+  push:
+    branches: [master]
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+
+permissions:
+  contents: read
+
+jobs:
+  conventional-commits:
+    name: Check conventional commits
+    runs-on: ubuntu-latest
+    steps:
+        - uses: actions/checkout@v4
+        - uses: wagoid/commitlint-github-action@v6
+