Add scripts to check and apply same format sequence as in MR

scripts/apply-format-changes.sh

+FAIRROOT_FORMAT_BASE=upstream/master
+BASE_COMMIT=${FAIRROOT_FORMAT_BASE:-HEAD}
+CHANGED_FILES=$(git diff --name-only $BASE_COMMIT | grep -E '.*\.(h|hpp|c|C|cpp|cxx|tpl)$' | grep -viE '.*LinkDef.h$')
+
+if [ -z $GIT_CLANG_FORMAT_BIN ]; then
+  echo "GIT_CLANG_FORMAT_BIN not defined, trying to use git-clang-format-10 if present"
+  GIT_CLANG_FORMAT_BIN=git-clang-format-10
+fi
+
+$GIT_CLANG_FORMAT_BIN --verbose --commit $BASE_COMMIT $CHANGED_FILES --extensions h,hpp,c,C,cpp,cxx,tpl
+git add $CHANGED_FILES
+git status
+git commit -m"Apply clang-format"

scripts/check-format-changes.sh

+git fetch upstream
+FAIRROOT_FORMAT_BASE=upstream/master
+BASE_COMMIT=${FAIRROOT_FORMAT_BASE:-HEAD}
+CHANGED_FILES=$(git diff --name-only $BASE_COMMIT | grep -E '.*\.(h|hpp|c|C|cpp|cxx|tpl)$' | grep -viE '.*LinkDef.h$')
+
+if [ -z $GIT_CLANG_FORMAT_BIN ]; then
+  echo "Warning:"
+  echo "GIT_CLANG_FORMAT_BIN not defined, trying to use git-clang-format-10 if present"
+  echo ""
+  GIT_CLANG_FORMAT_BIN=git-clang-format-10
+fi
+
+$GIT_CLANG_FORMAT_BIN --commit $BASE_COMMIT --diff $CHANGED_FILES --extensions h,hpp,c,C,cpp,cxx,tpl