Add backfeed suppression and update settings interface

[Cellivar]

This PR mostly rejiggers the backfeed setting to actually set properly. Previously it only was meant to work for ZPL's 'suppress backfeed once' on a per-label basis.

This also expands the settings page to be more flexible for additional settings in the near future.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	48.35%	2162 / 4471
🔵	Statements	48.35%	2162 / 4471
🔵	Functions	50.63%	159 / 314
🔵	Branches	64.13%	329 / 513

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
demo/test_advanced.ts	0%	0%	0%	0%	1-529
demo/test_index.ts	0%	0%	0%	0%	1-457
src/Printer.ts	0.63%	0%	0%	0.63%	15-29, 37-432
src/Commands/Commands.ts	41.36%	96%	48.88%	41.36%	134-135, 164-167, 171-174, 192-195, 199-210, 213-225, 229-237, 241-252, 256-281, 284-292, 296-304, 308-316, 320-328, 332-344, 348-354, 361-367, 383-386, 393-394, 408-409, 421-433, 437-445
src/Commands/Messages.ts	45.62%	75%	47.05%	45.62%	42-43, 46-47, 57-58, 60-61, 68-71, 80-81, 206-211, 214-240, 243-306, 318-331, 346-358
src/Commands/PrinterConfig.ts	24.13%	100%	50%	24.13%	12-35
src/Configs/BasePrinterConfig.ts	100%	90.9%	24.13%	100%
src/Configs/ConfigurationTypes.ts	94.11%	63.63%	71.42%	94.11%	173-174, 178-180, 194
src/Documents/ConfigDocument.ts	25%	75%	27.27%	25%	18-19, 32-33, 40-41, 44-46, 65-69, 72-74, 77-102, 107-108, 111-112, 115-122, 125-129, 132-139, 142-149, 152-157, 160-171, 174-187, 302-311
src/Documents/LabelDocument.ts	46.59%	100%	35.71%	46.59%	32-33, 42-43, 46-47, 56-62, 65-66, 75-84, 87-91, 94-102, 109-116
src/Languages/Epl/CmdConfigurationInquiry.ts	85.03%	63.01%	100%	85.03%	70-78, 150-152, 184-189, 246-247, 255-256, 277-278, 338-339, 341-342, 344-345, 347-348, 391-396
src/Languages/Epl/EplPrinterCommandSet.ts	53.71%	40%	42.85%	53.71%	40, 42-45, 50-54, 62-63, 65, 77, 80, 87, 93, 95, 97, 100, 102, 104, 106, 108, 110, 112, 114, 119, 121, 123, 127, 135-145, 148-152, 155-161, 164-172, 175-187, 190-197, 200-205, 208-214, 217-222, 225-231, 275-276, 284-294
src/Languages/Zpl/CmdXmlQuery.ts	85.88%	31.03%	94.44%	85.88%	50-54, 72-75, 78-82, 88-92, 97-98, 100-101, 127-131, 201, 203, 205, 216, 218, 228, 301
src/Languages/Zpl/ZplPrinterCommandSet.ts	53.33%	39.21%	43.47%	53.33%	49, 55-58, 63-67, 75-76, 90, 93, 97, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 127, 132, 134, 136, 142, 160-190, 193-195, 198-208, 211-219, 222-231, 234-244, 247-250, 253-261, 264-269, 272-276, 279-284, 313-323, 341-342

Generated in workflow #132 for commit 1dcd8fc by the Vitest Coverage Report Action