Allow features to be disabled at build time (#143)

* Add framework for built-time feature selection
* Allow MQTT, NTP, OTA features to be disabled at build time
* Allow Project screens to be disabled at build time
* Allow security features to be disabled at build time
* Switch to std::function for StatefulService function aliases for greater flexibility
* Bump various UI lib versions
* Update docs

lib/framework/SecurityManager.h

@@ -1,6 +1,7 @@
 #ifndef SecurityManager_h
 #define SecurityManager_h
 
+#include <Features.h>
 #include <ArduinoJsonJWT.h>
 #include <ESPAsyncWebServer.h>
 #include <ESPUtils.h>
@@ -62,21 +63,24 @@ class AuthenticationPredicates {
 
 class SecurityManager {
  public:
+#if FT_ENABLED(FT_SECURITY)
   /*
    * Authenticate, returning the user if found
    */
   virtual Authentication authenticate(const String& username, const String& password) = 0;
 
-  /*
-   * Check the request header for the Authorization token
-   */
-  virtual Authentication authenticateRequest(AsyncWebServerRequest* request) = 0;
-
   /*
    * Generate a JWT for the user provided
    */
   virtual String generateJWT(User* user) = 0;
 
+#endif
+
+  /*
+   * Check the request header for the Authorization token
+   */
+  virtual Authentication authenticateRequest(AsyncWebServerRequest* request) = 0;
+
   /**
    * Filter a request with the provided predicate, only returning true if the predicate matches.
    */
@@ -91,8 +95,8 @@ class SecurityManager {
   /**
    * Wrap the provided json request callback to provide validation against an AuthenticationPredicate.
    */
-  virtual ArJsonRequestHandlerFunction wrapCallback(ArJsonRequestHandlerFunction callback,
+  virtual ArJsonRequestHandlerFunction wrapCallback(ArJsonRequestHandlerFunction onRequest,
                                                     AuthenticationPredicate predicate) = 0;
 };
 
-#endif  // end SecurityManager_h
+#endif  // end SecurityManager_h