more ID functions

src/game.rs

@@ -385,6 +385,21 @@ impl Game {
         self.items.iter().map(|item| item.id.clone()).collect()
     }
 
+    #[inline]
+    pub fn dialogue_ids(&self) -> Vec<String> {
+        self.dialogues.iter().map(|dialogue| dialogue.id.clone()).collect()
+    }
+
+    #[inline]
+    pub fn ending_ids(&self) -> Vec<String> {
+        self.endings.iter().map(|ending| ending.id.clone()).collect()
+    }
+
+    #[inline]
+    pub fn variable_ids(&self) -> Vec<String> {
+        self.variables.iter().map(|variable| variable.id.clone()).collect()
+    }
+
     // todo dedupe?
 
     pub fn new_palette_id(&self) -> String {