Generate native suggestion objects once, and re-use as cached array

[genius257]

Generating the native suggestions should be done once, since it's not going to change

vscode-autoit/server/src/main.ts

Lines 361 to 367 in 9289dd2

	//Add all native suggestions
	completionItems = completionItems.concat(Object.keys(nativeSuggestions).map<CompletionItem>(nativeSuggestion => ({ //FIXME: Map Object.entries instead
	label: nativeSuggestions[nativeSuggestion]!.title || "",
	kind: nativeSuggestions[nativeSuggestion]!.kind,
	documentation: nativeSuggestions[nativeSuggestion]!.documentation,
	detail: nativeSuggestions[nativeSuggestion]!.detail,
	})));