Factor console code into a separate file.

console.cr

@@ -0,0 +1,36 @@
+def parse(input)
+  input.lines.map do |s|
+    code, int = s.split(" ")
+    {code, int.to_i32}
+  end
+end
+
+def run(prog)
+  acc = 0
+  pc = 0
+  visited = Set(Int32).new
+  input = Channel(Int32).new
+  output = Channel({Symbol, Int32}).new
+  spawn do
+    loop do
+      if pc >= prog.size
+        output.send({:term, acc})
+        break
+      elsif visited.includes? pc
+        output.send({:inf, acc})
+        break
+      end
+
+      visited << pc
+      code, int = prog[pc]
+      case code
+      when "acc"
+        acc += int
+      when "jmp"
+        pc += int - 1
+      end
+      pc += 1
+    end
+  end
+  {input, output}
+end