Add two_galaxies.py for galaxy particle simulation

Author: TimGoTheCreator

examples/TwoDifferentGalaxies/two_galaxies.py

@@ -0,0 +1,16 @@
+import os, sys
+
+root = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", ".."))
+if root not in sys.path:
+    sys.path.insert(0, root)
+    
+from tools.icbuilder import two_galaxies, save
+
+particles = two_galaxies(
+    N1=5000, R1=5.0, M1=1.0, scale1=1.0,
+    N2=4000, R2=4.0, M2=0.8, scale2=1.0,
+    angle_deg=45.0,
+    v_rel=0.5
+)
+
+save("two_galaxies.txt", particles)