feat: Add custom exceptions for structured error handling in Futag #2

	name: Syntax Check

	on: [push, pull_request]

	jobs:
	python-syntax:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: '3.12'
	- name: Check Python syntax
	run: \|
	python -c "
	import ast, sys, pathlib
	errors = []
	for f in pathlib.Path('src/python/futag-package/src/futag').glob('*.py'):
	try:
	ast.parse(f.read_text())
	except SyntaxError as e:
	errors.append(f'{f}: {e}')
	if errors:
	for e in errors: print(e)
	sys.exit(1)
	print('All Python files: syntax OK')
	"

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