feat(lib): Add entry hiding with content boolean

Add the simple value `hidden: true` to any entry (experience, education,
volunteering, skills, language, etc) and it will not be displayed on the
final output.

lib/lib.typ

@@ -64,7 +64,10 @@
   block(inset: 5%, width: 85%, text(fill: luma(150), body))
 }
 
-#let entry(item: ()) = {
+#let entry(item: (), show_sublists: true) = {
+  if "hidden" in item and item.hidden == true {
+    return
+  }
   if "title" in item {
     [*#item.title.at(lang)*]
   }
@@ -78,6 +81,7 @@
   if "date" in item {
     [ _#item.date.at(lang)_ \ ]
   }
+  if show_sublists == true {
     if "bullets" in item {
       for bullet in item.bullets {
         [- #bullet.at(lang)]
@@ -89,6 +93,7 @@
         subdued[ - #bullet.at(lang)]
       }
     }
+  }
   if "publication" in item {
     subdued[#item.publication.at(lang) \ ]
   }