Handle single table objects, not list of tables

[jh-RLI]

Requested by @jnnr:

Can we use the same function, but for single tables? This would allow us to not leave the loop here.

What I mean: Do not do this:

oem2orm/oem2orm/oep_oedialect_oem2orm.py

Line 109 in 80dffe6

for table in tables:

and this within the function

oem2orm/oem2orm/oep_oedialect_oem2orm.py

Lines 298 to 302 in 80dffe6

	metadata_files = [
	str(file) for file in oem_folder_path.iterdir() if file.suffix == ".json"
	]
	for metadata_file in metadata_files: