[INTERNAL] lib/processors/jsdoc: allow enum definitions using const

The JSDoc toolkit classifies 'enum' not as a 'kind' of its own. Instead,
symbols of a different kind (e.g. 'member' or 'constant') are
additionally flagged with 'symbol.isEnum = true'.

The UI5 plugin and template so far only expected symbols of kind
'member' to be flagged with 'isEnum'. With the support of ES6+ syntax,
using a 'const' declaration also makes sense when defining enums.
JSDoc creates a symbol of kind 'constant' in that case, which needs
to be understood by the UI5 plugin and template.

Cherry picked from SAP/openui5@0236e016a

lib/processors/jsdoc/lib/ui5/plugin.cjs

@@ -2923,7 +2923,7 @@ exports.handlers = {
 				};
 			}
 
-			if ( doclet.kind === 'member' && doclet.isEnum && Array.isArray(doclet.properties) ) {
+			if ( (doclet.kind === 'member' || doclet.kind === 'constant') && doclet.isEnum && Array.isArray(doclet.properties) ) {
 				// determine unique enum identifier from key set
 				let enumID = doclet.properties.map(function(prop) {
 					return prop.name;

lib/processors/jsdoc/lib/ui5/template/publish.cjs

@@ -173,7 +173,7 @@ function isModuleExport($) {
 }
 
 function isaClass($) {
-	return /^(namespace|interface|class|typedef)$/.test($.kind) || ($.kind === 'member' && $.isEnum )/* isNonEmptyNamespace($) */;
+	return /^(namespace|interface|class|typedef)$/.test($.kind) || (($.kind === 'member' || $.kind === 'constant') && $.isEnum )/* isNonEmptyNamespace($) */;
 }
 
 function supportsInheritance($) {
@@ -191,7 +191,7 @@ function supportsInheritance($) {
 function isFirstClassSymbol($) {
 	return (
 		/^(namespace|interface|class|typedef)$/.test($.kind)
-		|| $.kind === 'member' && $.isEnum
+		|| ($.kind === 'member' || $.kind === 'constant') && $.isEnum
 		|| ['function', 'member'].includes($.kind) && isModuleExport($)
 	)/* isNonEmptyNamespace($) */;
 }
@@ -727,7 +727,7 @@ function getMembersOfKind(data, kind) {
 	switch (kind) {
 	case 'property':
 		fnFilter = function($) {
-			return $.kind === 'constant' || ($.kind === 'member' && !$.isEnum);
+			return ($.kind === 'constant' || $.kind === 'member') && !$.isEnum;
 		};
 		break;
 	case 'event':
@@ -2034,7 +2034,7 @@ function createAPIJSON4Symbol(symbol, omitDefaults) {
 	}
 	*/
 
-	const kind = (symbol.kind === 'member' && symbol.isEnum) ? "enum" : symbol.kind; // handle pseudo-kind 'enum'
+	const kind = ((symbol.kind === 'member' || symbol.kind === 'constant') && symbol.isEnum) ? "enum" : symbol.kind; // handle pseudo-kind 'enum'
 
 	tag(kind);