add some documentation to RegisterShipInitFunc (#4995)

soh/soh/ShipInit.hpp

@@ -26,6 +26,37 @@ struct ShipInit {
     }
 };
 
+/**
+ * @brief Register a function to execute on boot and (optionally) in other situations
+ * 
+ * @param initFunc The function to execute
+ * @param updatePaths Strings to specify additional situations in which to execute the function
+ * 
+ * ### Examples:
+ * 
+ * #### Execute function `bar` on boot
+ * 
+ * ```cpp
+ * static RegisterShipInitFunc foo(bar);
+ * ```
+ * 
+ * #### Execute function `bar` on boot and when the CVar `baz` might have changed
+ * 
+ * ```cpp
+ * static RegisterShipInitFunc foo(bar, { "baz" });
+ * ```
+ * 
+ * #### Execute function `bar` on boot and when `IS_RANDO` might have changed
+ * 
+ * ```cpp
+ * static RegisterShipInitFunc foo(bar, { "IS_RANDO" });
+ * ```
+ * 
+ * ### Additional Information:
+ * 
+ * To get a better sense of when your function will be executed 
+ * you can look for `ShipInit::Init` calls throughout the codebase 
+ */
 struct RegisterShipInitFunc {
     RegisterShipInitFunc(std::function<void()> initFunc, const std::set<std::string>& updatePaths = {}) {
         auto& shipInitFuncs = ShipInit::GetAll();