CLI to install project (#164)

* CLI to install project

* CLI fixes

* Update README.md

* Cleanup gitignore

cli/src/config.ts

@@ -0,0 +1,17 @@
+import { exec } from 'child_process';
+
+export function execShell(cmd: string): Promise<string> {
+  return new Promise((resolve, reject) => {
+    exec(cmd, (error, stdout, stderr) => {
+      if (error) {
+        console.warn(`Error: ${error.message}`);
+        console.warn(`stderr: ${stderr}`);
+        reject(error);
+      }
+      resolve(stdout ? stdout : stderr);
+    });
+  });
+}
+
+export const REPO_URL = 'https://github.com/twentyhq/twenty.git';
+export const CLONE_DIR = 'twenty';