Implement M5Stack Cardputer + minor Tactility improvements (#331)

- Implement M5Stack Cardputer: display, SD card and keyboard
- `St7789Display` now supports a "gap" configuration
- `ElfApp` has improved errors

Boards/M5stackCardputer/Source/devices/CardputerKeyboard.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <Tactility/Thread.h>
+#include <Tactility/hal/keyboard/KeyboardDevice.h>
+
+#include "keyboard/keyboard.h"
+
+class CardputerKeyboard : public tt::hal::keyboard::KeyboardDevice {
+    KEYBOARD::Keyboard keyboard;
+    int lastKeyNum = 0;
+    lv_indev_t* _Nullable lvglDevice = nullptr;
+
+    static void readCallback(lv_indev_t* indev, lv_indev_data_t* data);
+
+public:
+
+    std::string getName() const override { return "Cardputer Keyboard"; }
+    std::string getDescription() const override { return "Cardputer internal keyboard"; }
+
+    bool startLvgl(lv_display_t* display) override;
+    bool stopLvgl() override;
+
+    bool isAttached() const override { return true; }
+
+    lv_indev_t* _Nullable getLvglIndev() override { return lvglDevice; }
+};