InkHUD refactoring (#6216)

* chore: todo.txt
* chore: comments
* fix: no fast refresh on VME290
Reverts a line of code which was accidentally committed
* refactor: god class
Divide the behavior from the old WindowManager class into several subclasses which each have a clear role.
* refactor: cppcheck medium warnings
Enough to pass github CI for now
* refactor: updateType selection
* refactor: don't use a setter for the shared AppletFonts
* fix: update prioritization
forceUpdate calls weren't being prioritized
* refactor: remove unhelpful logging
getTimeString is used for parsing our own time, but also the timestamps of messages. The "one time only" log printing will likely fire in unhelpful situations.
* fix: " "
* refactor: get rid of types.h file for enums
* Keep that sneaky todo file out of commits

src/graphics/niche/InkHUD/Applets/System/BatteryIcon/BatteryIconApplet.h

@@ -11,24 +11,22 @@ It should be optional, enabled by the on-screen menu
 
 #include "configuration.h"
 
-#include "graphics/niche/InkHUD/Applet.h"
+#include "graphics/niche/InkHUD/SystemApplet.h"
 
 #include "PowerStatus.h"
 
 namespace NicheGraphics::InkHUD
 {
 
-class BatteryIconApplet : public Applet
+class BatteryIconApplet : public SystemApplet
 {
   public:
+    BatteryIconApplet();
+
     void onRender() override;
-
-    void onActivate() override;
-    void onDeactivate() override;
-
     int onPowerStatusUpdate(const meshtastic::Status *status); // Called when new info about battery is available
 
-  protected:
+  private:
     // Get informed when new information about the battery is available (via onPowerStatusUpdate method)
     CallbackObserver<BatteryIconApplet, const meshtastic::Status *> powerStatusObserver =
         CallbackObserver<BatteryIconApplet, const meshtastic::Status *>(this, &BatteryIconApplet::onPowerStatusUpdate);