WIP: Emitter magic tools

Star image so far.  Lots more to do.
For https://sourceforge.net/p/tuxpaint/feature-requests/266/

docs/CHANGES.txt

@@ -7,6 +7,18 @@ Various contributors (see below, and AUTHORS.txt)
 https://tuxpaint.org/
 
 2024.December.25 (0.9.35)
+  * New Magic Tools:
+    ----------------
+    + WIP: Heart, Sparkle, and Star emitters
+      Click and drag to leave a short trail of shapes.
+      - TODO: Hearts
+      - TODO: Sparkles
+      - TODO: Icons
+      - TODO: Sound effects
+      - TODO: Documentation
+      Closes https://sourceforge.net/p/tuxpaint/feature-requests/266/
+      Bill Kendrick <bill@newbreedsoftware.com>
+
   * Text & Label Tool Improvements:
     -------------------------------
     + It is now possible to paste text from the copy/paste clipboard