feat(codestarconnection): add grants methods (#5)

* feat(codestarconnection): grant methods to easly add policy statements

This grant specific permission to the code star connection

* docs(codestarconnection): add how to use it in readme file

It adds the basic instrucction of how to create a code star connection

* test(codestarconnection): remove console log

it removes unncessary console.log function in a test

* docs(codestarconnection): update api documentation

This is use by contruct hub to show all methods available

Author: antonio-marquez-perez

API.md

@@ -1 +1,25 @@
-# AWS CodeStar Connection
+[![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
+![npm](https://img.shields.io/npm/v/%40jttc%2Faws-codestarconnection)
+
+# AWS CodeStar Connection Construct Library
+
+This package contains constructs for working with Amazon CodeStar Connection.
+
+## CodeStar Connection
+Define a Codestar Connection by creating a new instance of CodeStarConnection. You can create a connection for different providers
+
+``` typescript
+const codestartConnection = new CodeStarConnection(
+  this,
+  'CodeStarConnection',
+    {
+      connectionName: 'github-connection',
+      providerType: CodeStarConnectionProviderType.GITHUB,
+    }
+  );
+```
+
+
+
+
+