Merge develop into main (#348)

## App state

Improved app state management in `LoaderService` and `GuiService`:

- Re-ordered some of the state transitions
- Hardened `GuiService` for repeated events (that might trigger a re-render of an app that's already rendered)
- Validate state transitions in `LoaderService` and crash if an app transitions from the wrong state to the next one.

## LoaderService

- Removed `tt::loader::` functions and expose `LoaderService` interface publicly.
- Implement `stopAll()` and `stopAll(id)` which stops all instances of an app, including any apps that were launched by it.
- Rename `stop()` functions to `stopTop()`
- Created `stopTop(id)` which only stops the top-most app when the app id matches.
- Moved `loader::LoaderEvent` to `loader::LoaderService::Event`
- Changed app instance `std::stack` to `std::vector`

## Improvements

- `ElfApp`: error 22 now shows a hint that `main()` might be missing
- Starting, installing and uninstalling apps now stops any running app (and its children) on the stack

## Bugfixes

- `HttpdReq` out of memory issue now shows an error message and doesn't crash anymore (this would happen on devices without PSRAM with WiFi active, when an app was installed)
- `GuiService::hideApp()` lock should not wait for timeout and now waits indefinitely
- `Buildscript/release-sdk-current.sh` deletes the previous local release before building a new one

## Code correctness

- App classes were made `final`
- Apps that had a `void start()` now have a `LaunchId start()`
- `tt::app::State`: renamed `Started` to `Created` and `Stopped` to `Destroyed` to properly reflect earlier name changes

Tactility/Private/Tactility/app/AppInstance.h

@@ -13,11 +13,11 @@
 namespace tt::app {
 
 enum class State {
-    Initial, // App is being activated in loader
-    Started, // App is in memory
-    Showing, // App view is created
-    Hiding,  // App view is destroyed
-    Stopped  // App is not in memory
+    Initial, // AppInstance was created, but the state hasn't advanced yet
+    Created, // App was placed into memory
+    Showing, // App view was created
+    Hiding,  // App view was destroyed
+    Destroyed  // App was removed from memory
 };
 
 /**

Tactility/Private/Tactility/app/i2cscanner/I2cScanner.h

@@ -1,7 +1,9 @@
 #pragma once
 
+#include <Tactility/app/App.h>
+
 namespace tt::app::i2cscanner {
 
-void start();
+LaunchId start();
 
 }

Tactility/Private/Tactility/app/launcher/Launcher.h

@@ -1,7 +1,9 @@
 #pragma once
 
+#include <Tactility/app/App.h>
+
 namespace tt::app::launcher {
 
-void start();
+LaunchId start();
 
 }

Tactility/Private/Tactility/app/localesettings/LocaleSettings.h

@@ -1,7 +1,9 @@
 #pragma once
 
+#include <Tactility/app/App.h>
+
 namespace tt::app::localesettings {
 
-void start();
+LaunchId start();
 
 }

Tactility/Private/Tactility/app/timedatesettings/TimeDateSettings.h

@@ -1,7 +1,9 @@
 #pragma once
 
+#include <Tactility/app/App.h>
+
 namespace tt::app::timedatesettings {
 
-void start();
+LaunchId start();
 
 }

Tactility/Private/Tactility/app/timezone/TimeZone.h

@@ -1,10 +1,11 @@
 #pragma once
 
+#include <Tactility/app/App.h>
 #include <Tactility/Bundle.h>
 
 namespace tt::app::timezone {
 
-void start();
+LaunchId start();
 
 std::string getResultName(const Bundle& bundle);
 std::string getResultCode(const Bundle& bundle);

Tactility/Private/Tactility/app/wificonnect/WifiConnect.h

@@ -45,7 +45,7 @@ public:
 /**
  * Start the app with optional pre-filled fields.
  */
-void start(const std::string& ssid = "", const std::string& password = "");
+LaunchId start(const std::string& ssid = "", const std::string& password = "");
 
 bool optSsidParameter(const std::shared_ptr<const Bundle>& bundle, std::string& ssid);