Add yet-another-react-lightbox package and update .gitignore to exclude node_modules

frontend/node_modules/jquery/src/selector/contains.js

@@ -1,21 +0,0 @@
-define( [
-	"../core"
-], function( jQuery ) {
-
-"use strict";
-
-// Note: an element does not contain itself
-jQuery.contains = function( a, b ) {
-	var bup = b && b.parentNode;
-
-	return a === bup || !!( bup && bup.nodeType === 1 && (
-
-		// Support: IE 9 - 11+
-		// IE doesn't have `contains` on SVG.
-		a.contains ?
-			a.contains( bup ) :
-			a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
-	) );
-};
-
-} );

frontend/node_modules/jquery/src/selector/escapeSelector.js

@@ -1,31 +0,0 @@
-define( [
-	"../core"
-], function( jQuery ) {
-
-"use strict";
-
-// CSS string/identifier serialization
-// https://drafts.csswg.org/cssom/#common-serializing-idioms
-var rcssescape = /([\0-\x1f\x7f]|^-?\d)|^-$|[^\x80-\uFFFF\w-]/g;
-
-function fcssescape( ch, asCodePoint ) {
-	if ( asCodePoint ) {
-
-		// U+0000 NULL becomes U+FFFD REPLACEMENT CHARACTER
-		if ( ch === "\0" ) {
-			return "\uFFFD";
-		}
-
-		// Control characters and (dependent upon position) numbers get escaped as code points
-		return ch.slice( 0, -1 ) + "\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + " ";
-	}
-
-	// Other potentially-special ASCII characters get backslash-escaped
-	return "\\" + ch;
-}
-
-jQuery.escapeSelector = function( sel ) {
-	return ( sel + "" ).replace( rcssescape, fcssescape );
-};
-
-} );