feat: 초기 프로젝트 설정 및 룰.md 파일 추가

api.hyungi.net/node_modules/js-git/lib/modes.js

@@ -0,0 +1,28 @@
+"use strict";
+
+var masks = {
+  mask:   parseInt('100000', 8),
+  blob:   parseInt('140000', 8),
+  file:   parseInt('160000', 8)
+};
+
+var modes = module.exports = {
+  isBlob: function (mode) {
+    return (mode & masks.blob) === masks.mask;
+  },
+  isFile: function (mode) {
+    return (mode & masks.file) === masks.mask;
+  },
+  toType: function (mode) {
+    if (mode === modes.commit) return "commit";
+    if (mode === modes.tree) return "tree";
+    if ((mode & masks.blob) === masks.mask) return "blob";
+    return "unknown";
+  },
+  tree:   parseInt( '40000', 8),
+  blob:   parseInt('100644', 8),
+  file:   parseInt('100644', 8),
+  exec:   parseInt('100755', 8),
+  sym:    parseInt('120000', 8),
+  commit: parseInt('160000', 8)
+};