Complete application API

Most of the endpoints for the application API has been covered with a few notable ones missing, like servers (for example). Ideally this should be covered entirely.

The repository contains Markdown documentation for the Pterodactyl and Wings APIs, but no specific files are named. Start by inventorying the existing application API documentation and comparing its covered endpoints with the API reference, including the servers endpoint. Done means the application API is documented comprehensively, though the issue does not define a precise endpoint list.

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