Compressed Files like gzip

[Sciumo]

I noticed GD compression only works with their own per godotengine/godot#28999
Someone on that issue has a work around that would be nice to have in easyfiles.

static func open_gzip(fpath: String) -> PackedByteArray:
	var f := FileAccess.open(fpath, FileAccess.READ)
	if f == null:
		push_error("Could not open file ", fpath, ", error ", FileAccess.get_open_error())
		return PackedByteArray()
	
	# https://docs.fileformat.com/compression/gz/
	# Read 10-byte header
	var header := f.get_16() # 1f 8b
	var compression_method := f.get_8() # 08 for DEFLATE
	var file_flags := f.get_8()
	var timestamp := f.get_32()
	var compression_flags := f.get_8()
	var os_id := f.get_8()
	# Assuming no other extra header stuff, which my file doesn't have, 
	# but might need to be handled eventually
	
	var compressed_data_position := f.get_position()
	print("compressed_data_position ", compressed_data_position)
	var total_file_length := f.get_length()
	var footer_length := 8
	var compressed_data_size := total_file_length - compressed_data_position - footer_length
	var compressed_data := f.get_buffer(compressed_data_size)
	
	# Read footer
	var checksum_crc32 := f.get_32()
	var decompressed_data_size := f.get_32()
	print(f.get_position())
	print("decompressed_data_size ", decompressed_data_size)
	print("CRC32 ", checksum_crc32)
	
	f = null
	
	#compressed_data = FileAccess.get_file_as_bytes(fpath)
	
	# Decompress data ourselves. Usually the format is DEFLATE.
	# Godot allows to specify either GZIP or DEFLATE, but there is no difference in the 
	# implementation.
	var decompressed_data := compressed_data.decompress_dynamic(-1, FileAccess.COMPRESSION_DEFLATE)
	print("decompressed_data.size(): ", decompressed_data.size())
	
	return decompressed_data

[ASecondGuy]

This workaround would not work with easyfiles because it relies on the get and store methods of FileAccess.
So I'd need a wrapper that does this workaround in the background or use a tempfile that is in Godot format.

I might do it when I have time. Could take some time because I don't normally use the compression feature.