Add Eldev and new CI file that uses it

.github/workflows/ci.yaml

@@ -0,0 +1,38 @@
+name: CI
+
+on:
+  # Triggers the workflow on push or pull request events but only for the "main" branch
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+test:
+  runs-on: ubuntu-latest
+  strategy:
+    matrix:
+      emacs_version:
+        # Add more lines like this if you want to test on different Emacs versions.
+        - 28.1
+        - 28.2
+        - 29.1
+        - 29.2
+  steps:
+  - name: Set up Emacs
+    uses: jcs090218/setup-emacs@master
+    with:
+      version: ${{matrix.emacs_version}}
+
+  - name: Install Eldev
+    uses: emacs-eldev/setup-eldev@v1
+
+  - name: Check out the source code
+    uses: actions/checkout@v4
+
+  - name: Lint the project
+    run: |
+      eldev -p -dtT lint
+
+  - name: Test the project
+    run: |
+      eldev -p -dtT test

Eldev

@@ -0,0 +1,8 @@
+; -*- mode: emacs-lisp; lexical-binding: t -*-
+
+;; Uncomment some calls below as needed for your project.
+(eldev-use-package-archive 'gnu-elpa)
+;(eldev-use-package-archive 'nongnu-elpa)
+                                        ;(eldev-use-package-archive 'melpa)
+(setq eldev-standard-excludes `(:or ,eldev-standard-excludes "plz*" "utilities/*"))
+(setq checkdoc-force-docstrings-flag nil)