adding in moonbit example

Author: eyberg

moonbit/README.md

@@ -0,0 +1,15 @@
+MoonBit Unikernel Hello World
+================
+
+```
+moon new hello
+cd hello
+moon run src/main
+```
+
+Note: 'moon run' does both compile && run which execs so we just compile
+first and then execute the runner instead:
+
+```
+ ops run -c config.json ~/.moon/bin/moonrun
+```

moonbit/config.json

@@ -0,0 +1,5 @@
+{
+  "Dirs": ["src", "target", ".mooncakes"],
+  "Args": ["target/wasm-gc/release/build/main/main.wasm"],
+  "Files": ["moon.mod.json"]
+}