kde/kf6-extra-cmake-modules: rebase to 6.28.0 (ECM) + teach version parser set(VERSION)

kf6-kcoreaddons 6.28.0 requires ECM >= 6.28.0 but the vendored ECM source/ was
still 6.10.0: the sync engine skipped it because ECM's version marker is a bare
set(VERSION "X.Y.Z") that the parser didn't recognize (only KF_VERSION /
PROJECT_VERSION / RELEASE_SERVICE_VERSION). Re-lay ECM from its 6.28.0 source.tar
(pure cmake modules, no Redox port) and teach both the sync engine and the
validator to read set(VERSION) so this class is caught, not silently skipped.

local/recipes/kde/kf6-extra-cmake-modules/source/kde-modules/kde-git-commit-hooks/pre-commit.in

@@ -1,3 +1,25 @@
 #!/usr/bin/env bash
 
 ${PRE_COMMIT_SCRIPTS}
+
+RESULT=$?
+if [ $RESULT != 0 ]; then
+    exit $RESULT
+fi
+
+# If the user has custom commit hooks defined in pre-commit.d directory,
+# execute them
+PRE_COMMIT_D_DIR="$(dirname "$0")/pre-commit.d/"
+
+if [ -d "$PRE_COMMIT_D_DIR" ]; then
+    for PRE_COMMIT_D_HOOK in "$PRE_COMMIT_D_DIR"/*; do
+        ./"$PRE_COMMIT_D_HOOK"
+        RESULT=$?
+        if [ $RESULT != 0 ]; then
+            echo "$PRE_COMMIT_D_HOOK returned non-zero: $RESULT, commit aborted"
+            exit $RESULT
+        fi
+    done
+fi
+
+exit 0