Add simple SPH marching cubes example

Author: w1th0utnam3

Cargo.lock

@@ -57,6 +57,9 @@ ply-rs = { version = "0.1.3", optional = true }
 flate2 = { version = "1.0", optional = true }
 nom = { version = "8.0", optional = true }
 serde_json = { version = "1.0", optional = true }
+clap = { version = "4.5", features = ["derive"] }
+fern = "0.7"
+chrono = "0.4"
 
 [dev-dependencies]
 criterion = "0.5.1"