Introduce default configuration profiles in the Example App

MR: Pending

Description

The Example App is a great way to quickly test changes to the Web IDE without having to generate a package locally and updating it in the GitLab Rails app. We can also connect to different environments/profiles, such as gdk and/or gitlab.com via the configuration form UI. It is also used in the Web IDE MR pipeline to verify the functionality without checking things out locally.

Most of the time, we don't need to change these configurations. We could greatly benefit from file-based default configuration profiles to bypass the need of filling out the form. For iterative purposes, we will start with supporting authType: none only.

Acceptance Criteria

• When running yarn start:example with a profile flag, we will start the Web IDE based on default configs set for that profile without seeing the config form UI.
• When running yarn start:example without a profile flag, the config form is displayed.

Technical Requirements

• Create a profile.json with default configs based on the ExampleConfig type for GDK and gitlab.com profiles.
• Update vite.config.ts to check for presence of profile flag and store as global variable [doc].
• Modify App.vue to read from profile.json based on the profile flag if it exists and set to config state. Also want to set runWebIde to true if the profile exists.