Add babel-code-frame README

packages/babel-code-frame/README.md

@@ -1 +1,32 @@
 # babel-code-frame
+
+> Generate errors that contain a code frame that point to source locations.
+
+## Install
+
+```sh
+$ npm install babel-core
+```
+
+### Usage
+
+```js
+import codeFrame from 'babel-code-frame';
+
+const rawLines = `class Foo {
+  constructor()
+}`;
+const lineNumber = 2;
+const colNumber = 16;
+
+const result = codeFrame(rawLines, lineNumber, colNumber, { /* options */ });
+
+console.log(result);
+```
+
+```sh
+  1 | class Foo {
+> 2 |   constructor()
+    |                ^
+  3 | }
+```