alpine -> arch for cpp build workflow

.gitea/workflows/build-cpp.yml

@@ -6,7 +6,7 @@ on:
 jobs:
     build-zshell:
         runs-on: alpine
-        container: node:26-alpine
+        container: archlinux:latest
 
         steps:
             - name: Checkout
@@ -14,23 +14,22 @@ jobs:
 
             - name: Install tools
               run: |
-                  echo https://dl-cdn.alpinelinux.org/alpine/edge/testing >> /etc/apk/repositories
-                  apk update
-                  apk add --no-cache \
-                    build-base \
+                  pacman -Syu --noconfirm
+                  pacman -S --noconfirm \
+                    base-devel \
                     cmake \
                     ninja \
                     pkgconf \
-                    qt6-qtbase-dev \
-                    qt6-qtdeclarative-dev \
-                    qt6-qtshadertools-dev \
-                    qt6-qttools-dev \
-                    pipewire-dev \
-                    libqalculate-dev \
-                    glib-dev \
-                    aubio-dev \
+                    qt6-base \
+                    qt6-declarative \
+                    qt6-shadertools \
+                    qt6-tools \
+                    pipewire \
+                    libqalculate \
+                    glib2 \
+                    aubio \
+                    cava \
                     git
-                  apk add --no-cache cava
 
             - name: Configure
               run: cmake -S . -B build -G Ninja