Add CI workflow to auto-update pkgver in moonarch-pkgbuilds

Same pattern as moongreet/moonlock/moonset — pushes to main
trigger a pkgver bump so paru detects updates.

.gitea/workflows/update-pkgver.yaml

@@ -0,0 +1,42 @@
+# ABOUTME: Updates pkgver in moonarch-pkgbuilds after a push to main.
+# ABOUTME: Ensures paru detects new versions of this package.
+
+name: Update PKGBUILD version
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  update-pkgver:
+    runs-on: moonarch
+    steps:
+      - name: Checkout source repo
+        run: |
+          git clone --bare http://gitea:3000/nevaforget/moonarch.git source.git
+          cd source.git
+          PKGVER=$(printf "r%s.%s" "$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)")
+          echo "New pkgver: $PKGVER"
+          echo "$PKGVER" > /tmp/pkgver
+
+      - name: Update PKGBUILD
+        run: |
+          PKGVER=$(cat /tmp/pkgver)
+          git clone http://gitea:3000/nevaforget/moonarch-pkgbuilds.git pkgbuilds
+          cd pkgbuilds
+
+          OLD_VER=$(grep '^pkgver=' moonarch-git/PKGBUILD | cut -d= -f2)
+          if [ "$OLD_VER" = "$PKGVER" ]; then
+            echo "pkgver already up to date ($PKGVER)"
+            exit 0
+          fi
+
+          sed -i "s/^pkgver=.*/pkgver=$PKGVER/" moonarch-git/PKGBUILD
+          echo "Updated pkgver: $OLD_VER → $PKGVER"
+
+          git config user.name "pkgver-bot"
+          git config user.email "gitea@moonarch.de"
+          git add moonarch-git/PKGBUILD
+          git commit -m "chore(moonarch-git): bump pkgver to $PKGVER"
+          git -c http.extraHeader="Authorization: token ${{ secrets.PKGBUILD_TOKEN }}" push