feat(add github action)

There is no CI/CD currently. This adds a pipeline based on arch docker so it gets build with latest godot. Also publishes on tag creation

.github/workflows/main.yml

@@ -0,0 +1,62 @@
+name: Build ChimeraOS Installer
+
+on:
+  push:
+    branches:
+      - main
+    tags: '*'
+  workflow_dispatch:
+
+jobs:
+  build-installer:
+    name: Build Graphical Installer
+    runs-on: ubuntu-latest
+
+    container:
+      image: archlinux:base-devel
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up pacman keyring
+        run: |
+          pacman-key --init
+          pacman-key --populate archlinux
+          mkdir -p /etc/gnupg && echo "auto-key-retrieve" >> /etc/gnupg/gpg.conf
+      - name: Install dependencies
+        run: |
+          pacman -Syu --noconfirm unzip godot wget git fontconfig
+      - name: Build ChimeraOS installer
+        id: build
+        shell: bash
+        run: |
+          godot --version
+          make build
+      - name: Upload package artifact
+        if: github.ref_type == 'tag'
+        uses: actions/upload-artifact@v3
+        with:
+          name: chimeraos-installer
+          path: |
+            build/chimeraos-installer.x86_64
+          if-no-files-found: error
+
+  make-release:
+    name: Release
+    runs-on: ubuntu-latest
+    needs: build-installer
+    if: github.ref_type == 'tag'
+    steps:
+      - name: Download artifacts
+        uses: actions/download-artifact@v3
+        with:
+          name: chimeraos-installer
+          path: '.'
+      - name: Make release
+        uses: softprops/action-gh-release@v1
+        with:
+          name: ChimeraOS installer
+          token: ${{ secrets.GITHUB_TOKEN }}
+          draft: false
+          prerelease: true
+          fail_on_unmatched_files: true
+          files: |
+            chimeraos-installer.x86_64