Check for JP2 Optimisation

[fmcc]

At present the check is_tile_optimised_jp2 just returns True if the file suffix is .jp2

appetiser/appetiser/convert/image.py

Lines 20 to 24 in 7d0c43c

	def is_tile_optimised_jp2(filepath: Path) -> bool:
	"""Determines if a file is a JPEG2000 and whether it is optimised.
	TODO: check for optimisation rather than just based on extension.
	"""
	return filepath.suffix == ".jp2"

This could potentially be updated to check the actual file optimisation if required.

Originally posted by @donaldgray in #25 (comment)