Add missing engine locale lib (#487)

Resources/Locale/ru-RU/robust-toolbox/_engine_lib.ftl

@@ -0,0 +1,63 @@
+# Used internally by the THE() function.
+zzzz-the =
+    { PROPER($ent) ->
+       *[false] the { $ent }
+        [true] { $ent }
+    }
+# Used internally by the SUBJECT() function.
+zzzz-subject-pronoun =
+    { GENDER($ent) ->
+        [male] он
+        [female] она
+        [epicene] они
+       *[neuter] оно
+    }
+# Used internally by the OBJECT() function.
+zzzz-object-pronoun =
+    { GENDER($ent) ->
+        [male] его
+        [female] её
+        [epicene] их
+       *[neuter] его
+    }
+# Used internally by the POSS-PRONOUN() function.
+zzzz-possessive-pronoun =
+    { GENDER($ent) ->
+        [male] его
+        [female] её
+        [epicene] их
+       *[neuter] его
+    }
+# Used internally by the POSS-ADJ() function.
+zzzz-possessive-adjective =
+    { GENDER($ent) ->
+        [male] сам
+        [female] сама
+        [epicene] сами
+       *[neuter] сам
+    }
+# Used internally by the REFLEXIVE() function.
+zzzz-reflexive-pronoun =
+    { GENDER($ent) ->
+        [male] сам
+        [female] сама
+        [epicene] сами
+       *[neuter] сам
+    }
+# Used internally by the CONJUGATE-BE() function.
+zzzz-conjugate-be =
+    { GENDER($ent) ->
+        [epicene] are
+       *[other] is
+    }
+# Used internally by the CONJUGATE-HAVE() function.
+zzzz-conjugate-have =
+    { GENDER($ent) ->
+        [epicene] have
+       *[other] has
+    }
+# Used internally by the CONJUGATE-BASIC() function.
+zzzz-conjugate-basic = { GENDER($ent) ->
+    [epicene] { $first }
+   *[other] { $second }
+   }