Rearranged sidebar links (#1022)

* Rearranged sidebar links

* change quick start to quickstart

docs/content/tutorial/0-set-up-your-development-environment.md

@@ -1,5 +1,5 @@
 ---
-title: 0. Set up your development environment
+title: Set up your development environment
 ---
 
 # Set up your development environment

docs/content/tutorial/1-creating-your-medusa-server.md

@@ -1,5 +1,5 @@
 ---
-title: 1. Creating your Medusa server
+title: Creating your Medusa server
 ---
 
 # Creating your Medusa server

docs/content/tutorial/2-adding-custom-functionality.md

@@ -1,5 +1,5 @@
 ---
-title: 2. Adding custom functionality
+title: Adding custom functionality
 ---
 
 # Adding custom functionality

docs/content/tutorial/3-linking-your-local-project-with-medusa-cloud.md

@@ -1,5 +1,5 @@
 ---
-title: 3. Linking your local project with Medusa Cloud
+title: Linking your local project with Medusa Cloud
 ---
 
 # Linking your local project with Medusa Cloud