# Functions
GetPluginManagerInstance returns the default PluginManager instance.
NewPluginManager creates a new PluginManager instance.
PluginMiddleware applies the plugin hooks around each HTTP request.
SetDefaultPluginManager sets the default PluginManager instance.
# Variables
DefaultPluginManager is the default instance used by the application.
# Structs
PluginManager manages loading and initialization of plugins.
# Interfaces
Plugin defines the interface for GoUP plugins.