Feature Request: add an sap.xml.ignorePaths option

[commitToStahl]

Sometimes you need to skip XML validation (e.g. a bug in your addon or XMLs from libs) without dropping syntax-highlighting or schema support

Current hack

current weird workaround
	"files.associations": {
		"**/node_modules/**/*.xml": "plaintext"
	},

other example would be the "cSpell.ignorePaths" flag in settings or like .eslintignore file

That way you can temporarily ignore known-issue XML files and remove the patterns once the underlying bugs are fixed.