Split things out for more testability

[Cellivar]

With the previous changes in place it's easier to make more of these functions pure and break them out into separate modules. Writing more tests against the smaller functions will be easier now.

This also moves the initial message handling function down to the base CommandSet class, with a delegate being registered in the child language classes. We also expose the current config to the message handling delegate as there are some EPL messages that may benefit from the added context.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	61.73%	2797 / 4531
🔵	Statements	61.73%	2797 / 4531
🔵	Functions	48.84%	191 / 391
🔵	Branches	75.46%	492 / 652

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
src/Printer.ts	0.61%	0%	0%	0.61%	15-29, 37-446
src/Commands/CommandSet.ts	54.92%	95%	68.42%	54.92%	130-131, 137-147, 166-167, 170-189, 192-209, 216-217, 220-232
src/Commands/Messages.ts	56.97%	82.35%	53.33%	56.97%	38-39, 42-43, 53-54, 56-57, 64-67, 76-77, 89-90, 223-228, 231-295
src/Configs/ConfigurationTypes.ts	94.11%	63.63%	71.42%	94.11%	185-186, 190-192, 206
src/Languages/Epl/BasicCommands.ts	25.35%	50%	18.75%	25.35%	6-16, 19-23, 26-32, 35-43, 46-58, 61-69, 72-77, 80-87, 90-101, 104-115, 118-167, 170-232, 276-277, 285-295
src/Languages/Epl/CmdConfigurationInquiry.ts	85.27%	73.03%	100%	85.27%	72-80, 196-201, 249-258, 367-368, 370-371, 373-374, 376-377, 382-383, 385-386, 390-391, 433-438
src/Languages/Epl/EplPrinterCommandSet.ts	92.72%	100%	35.48%	92.72%	89-91, 97-99, 105-107, 129-131
src/Languages/Epl/Messages.ts	86%	57.14%	100%	86%	76-83
src/Languages/Zpl/BasicCommands.ts	40%	44.44%	23.52%	40%	16-46, 49-51, 54-64, 67-75, 78-87, 90-98, 101-103, 106-109, 112-120, 123-128, 131-134, 137-140, 169-179, 197-198
src/Languages/Zpl/Config.ts	4.16%	0%	0%	4.16%	39-92
src/Languages/Zpl/Messages.ts	3.38%	100%	0%	3.38%	5-107
src/Languages/Zpl/ZplPrinterCommandSet.ts	93.97%	100%	35.48%	93.97%	73-77, 131-133, 199-200

Generated in workflow #145 for commit c0ba034 by the Vitest Coverage Report Action

[Cellivar]

One PR that doesn't add a bajillion lines finally..