Kaleidoscope: Add section for message resource IDs

This CL splits the Kaleidoscope resource ID allotment into includes and
messages sections.

Bug: 1045435
Change-Id: If21442a8404a2e924424ebe62aeb9b2b29524bfc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2032407Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Robert Flack <flackr@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738783}

tools/gritsettings/resource_ids.spec

@@ -195,6 +195,7 @@
     # Big alignment at start of section.
     "META": {"align": 100},
     "includes": [2000],
+    "messages": [2010],
   },
   "chrome/browser/resources/bluetooth_internals/resources.grd": {
     "includes": [2020],