Fix CI: drop incorrect -c flag, fix word splitting in tests

build-iso:
- Remove -c flag (it takes a pacman.conf path, not a clean flag)
- Use absolute paths for mkarchiso with -- separator
- Copy local-aur.files* alongside local-aur.db*

tests:
- Fix word splitting: use 'while IFS= read -r' instead of
  'for f in ' for shell and YAML file loops
- Fix YAML find filter to use -not -path like shell find

.gitea/workflows/build-iso.yaml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup local AUR repo
         run: |
           mkdir -p /tmp/localrepo
-          cp localrepo/*.pkg.tar.zst localrepo/local-aur.db* /tmp/localrepo/
+          cp localrepo/*.pkg.tar.zst localrepo/local-aur.db* localrepo/local-aur.files* /tmp/localrepo/
           sed -i 's|file:///home/alvin/alvinarch/localrepo|file:///tmp/localrepo|' pacman.conf
 
       - name: Install archiso and dependencies
@@ -27,8 +27,8 @@ jobs:
 
       - name: Build Arch ISO
         run: |
-          rm -rf "${PWD}/work" || true
-          mkarchiso -v -c -w "${PWD}/work" -o "${PWD}/out" -- "${PWD}"
+          rm -rf "$PWD/work" || true
+          mkarchiso -v -w "$PWD/work" -o "$PWD/out" -- "$PWD"
 
       - name: Generate Unique Dynamic Tag
         id: tag