Feature: NewGRF callback profiling (#7868)

Adds a console command newgrf_profile to collect some profiling data about NewGRF action 2 callbacks and produce a CSV file.

src/spritecache.cpp

@@ -145,6 +145,17 @@ uint GetOriginFileSlot(SpriteID sprite)
 	return GetSpriteCache(sprite)->file_slot;
 }
 
+/**
+ * Get the GRF-local sprite id of a given sprite.
+ * @param sprite The sprite to look at.
+ * @return The GRF-local sprite id.
+ */
+uint32 GetSpriteLocalID(SpriteID sprite)
+{
+	if (!SpriteExists(sprite)) return 0;
+	return GetSpriteCache(sprite)->id;
+}
+
 /**
  * Count the sprites which originate from a specific file slot in a range of SpriteIDs.
  * @param file_slot FIOS file slot.