Remove jquery.i18n code that the ULS extension overrides

Instead of using the whole jquery.i18n code, use only required parts
that are not customized in MW ULS. For this define a new RL module
ext.uls.i18n.

Also refactor MW message store for jquery.i18n.

Change-Id: Idda9fe505428ade409d937314d7216ebb4232c36

lib/jquery.i18n/languages/he.js

@@ -0,0 +1,31 @@
+/**
+ * Hebrew (עברית) language functions
+ */
+( function ( $ ) {
+	'use strict';
+
+	$.i18n.languages.he = $.extend( {}, $.i18n.languages['default'], {
+		convertGrammar: function ( word, form ) {
+			switch ( form ) {
+			case 'prefixed':
+			case 'תחילית': // the same word in Hebrew
+				// Duplicate prefixed "Waw", but only if it's not already double
+				if ( word.substr( 0, 1 ) === 'ו' && word.substr( 0, 2 ) !== 'וו' ) {
+					word = 'ו' + word;
+				}
+
+				// Remove the "He" if prefixed
+				if ( word.substr( 0, 1 ) === 'ה' ) {
+					word = word.substr( 1, word.length );
+				}
+
+				// Add a hyphen (maqaf) before numbers and non-Hebrew letters
+				if ( word.substr( 0, 1 ) < 'א' || word.substr( 0, 1 ) > 'ת' ) {
+					word = '־' + word;
+				}
+			}
+
+			return word;
+		}
+	} );
+}( jQuery ) );