feat: enhance compiler

- Add comments and test for it
- Add semicolon as required end of some expressions
- Add new arguments parser
- Add multi-file compilation
- Add colors in output

exl/fn.fzs

@@ -1,24 +1,24 @@
 int fib(int n)
 {
   if (n <= 1)
-    return n
+    return n;
 
-  return fib(n - 1) + fib(n - 2)
+  return fib(n - 1) + fib(n - 2);
 }
 
 uint sum(uint a, uint b)
 {
-  return a + b
+  return a + b;
 }
 
-printline("Test #1: fibonacci")
-int result = fib(7)
+printline("Test #1: fibonacci");
+int result = fib(7);
 if (result == 13)
-  printline("Recurse test passed")
-else printline("Recurse test failed")
+  printline("Recurse test passed");
+else printline("Recurse test failed");
 
-printline("Test #2: sum")
+printline("Test #2: sum");
 if (sum(2, 2) == 4)
-  printline("Sum test passed")
-else printline("Sum test failed")
+  printline("Sum test passed");
+else printline("Sum test failed");