Add diagnostic error MultipleParameters

[AziatkaVictor]

Is your feature request related to a problem? Please describe.
In same section sometimes can be multiple same parameters. It's can create errors and crashes during runtime.

Describe the solution you'd like
Add diagnostic for multiple same parameters inside one section. It can be created while validating section:

ltx-support/src/ltx/ltxCondlist.ts

Lines 65 to 71 in 7571031

	this.infos = this.findElements(/(\-|\+)(?!\d)\w*\b(?<=\w)/g, LtxSemanticType.variable, LtxSemanticModification.declaration, LtxSemanticDescription.info);
	this.validateInfoCondition();
	this.actions = this.findElements(/(\=|\!)\w*\b(?<=\w)/g, LtxSemanticType.function, LtxSemanticModification.definition, null);
	this.validateActionCondition();
	this.validateActions();