Add CI/CD files for building the plugin

* Build and publish the base arch linux image every midnight
* Build the plugin on every PR and push to main, and every night at 2AM

.github/Dockerfile

@@ -0,0 +1,25 @@
+FROM archlinux:latest
+
+# Update the package repositories and install sudo
+RUN pacman -Syu --noconfirm --needed sudo git base-devel
+
+# Create a new user
+RUN useradd -m user && \
+  passwd -d user && \
+  printf 'user ALL=(ALL) ALL\n' | tee -a /etc/sudoers
+
+# Switch to the new user so makepkg doesn't run as root
+USER user
+WORKDIR /home/user
+
+# Install paru package manager
+RUN git clone https://aur.archlinux.org/paru.git && \
+  cd paru && \
+  makepkg -si --noconfirm
+
+WORKDIR /app
+
+USER root
+
+# Define the command to run your application
+CMD ["/bin/bash"]

.github/workflows/build-docker-image.yml

@@ -0,0 +1,28 @@
+name: Build and Push Docker Image
+
+on:
+  schedule:
+    # run every night at midnight
+    - cron: '0 0 * * *'
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: .github/Dockerfile
+          push: true
+          tags: duckonaut/hyprland-arch:latest

.github/workflows/main.yml

@@ -0,0 +1,32 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+  schedule:
+    # run every night at 2AM (the base docker image is updated at midnight)
+    - cron: '0 2 * * *' 
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      # image built from the Dockerfile in the .github/ folder
+      image: duckonaut/hyprland-arch:latest
+    steps:
+    - name: Install dependencies
+      # TODO: remove hyprwayland-scanner-git once hyprland-git properly depends on it
+      run: |
+        sudo -u user sh -c "paru -Syu --noconfirm hyprwayland-scanner-git hyprland-git"
+
+    - name: Checkout current repository
+      uses: actions/checkout@v4
+
+    - name: Build current repository
+      run: |
+        meson setup build --wipe
+        ninja -C build