Added support for Apache Avro, and thus for schemaful formats #1119

	name: code-checks

	on: [ push, pull_request ]

	jobs:
	check-includes-are-relative:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- shell : bash
	run: \|
	cd include
	errors=0
	for file in $(find . -name '*.hpp'); do
	while read -r line; do
	if [[ "$line" = "" ]]; then continue; fi
	what=$(printf "$line" \| sed -n 's/^."$.$"\s*$/\1/p')
	pushd $(dirname $(readlink -f "$file" )) > /dev/null
	if ! [[ -e "$what" ]]; then
	where=$(printf "$line" \| grep -oP '^.*:[0-9]+')
	echo Non-relative include of $what @ $where
	((errors++))
	fi
	popd > /dev/null
	done <<< $(grep -HnoP '#include ".*"' $file)
	done
	exit $errors

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