Create entry point for assembling and then running assembly code from a text file

sketches/run-asm-file.js

@@ -0,0 +1,14 @@
+// Usage: `node assembler-and-run-sketch.js assembly.asm`
+
+const fs = require('fs');
+const computer = require('./simulator-sketch-v3.js');
+const assembler = require('./assembler_sketch.js');
+
+// console.log(`Reading ${filename}`);
+const filename = process.argv[2];
+const inputFile_str = fs.readFileSync(filename, 'utf8');
+let machineCode = assembler.assemble(inputFile_str);
+console.log("Machine code:");
+console.log(machineCode);
+
+computer.runProgram(machineCode);