`all_columns()["StudyCases"]` does not match the published StudyCases.csv

[langestefan]

In format_information the function all_columns() declares the StudyCases table with 7 columns, it is missing "voltLvl". Additionally the first column is spelled wrong, it should be StudyCase (so not trailing 's)

Suggested fix

format_information.py:

simbench/simbench/converter/format_information.py

Lines 443 to 451 in c426a1a

	"StudyCases": [
	"Study Cases",
	"pload",
	"qload",
	"Wind_p",
	"PV_p",
	"RES_p",
	"Slack_vm",
	],

"StudyCases": [
    "Study Case",
    "voltLvl",
    "pload",
    "qload",
    "Wind_p",
    "PV_p",
    "RES_p",
    "Slack_vm",
],

simbench/simbench/converter/format_information.py

Line 207 in c426a1a

"StudyCases": [object] + [float] * 6,

"StudyCases": [object, int] + [float] * 6,