Snake (#2549)

* Create the Shopping Cart Lock app

Will demonstrate tomorrow. Don't merge until I do 😁

* Fixes for HTotoo's comments 😎

* Improved audio the best I can.

If nobody has any ideas to further improve high frequencies of the audio, the hardware may not be capable. I still need to check with line-out to better speaker to make sure it's not just the speaker, but it shouldn't be.

* Compared against baseband_api.cpp - matched some things better but still playback seems to be missing higher fq sounds

* renamed wav files to a more specific / less generic name

* indentation + using variables instead of litteral names for wav files to use

* indentation

* Made a Snake game - enjoy

* Code formatting. I always forget.

* move to keep sort order

* Update external.ld

Sorry I should have also asked if there was any reason that address ranges 0xADDA0000--0xADDD0000 were skipped in external.ld.  I assumed there wasn't so I changed it to be consecutive using the same 0x10000 step as the other modules.  If there is any reason to skip them then we should add a comment to note it.  Of course these are all just temporary address values used for linking and get overwritten by a kludgy "search & replace" during the build process.

Resolves enhancement request #764

---------

Co-authored-by: gullradriel <gullradriel@no-mail.com>
Co-authored-by: Mark Thompson <129641948+NotherNgineer@users.noreply.github.com>

firmware/application/external/snake/SPI_TFT_ILI9341.h

@@ -0,0 +1,68 @@
+/*
+ * ------------------------------------------------------------
+ * |  Made by RocketGod                                       |
+ * |  Find me at https://betaskynet.com                       |
+ * |  Argh matey!                                             |
+ * ------------------------------------------------------------
+ */
+
+#ifndef __UI_SPI_TFT_ILI9341_H__
+#define __UI_SPI_TFT_ILI9341_H__
+
+ui::Painter painter;
+
+static int bg_color;
+
+enum {
+    White,
+    Blue,
+    Yellow,
+    Purple,
+    Green,
+    Red,
+    Maroon,
+    Orange,
+    Black,
+};
+
+static const Color pp_colors[] = {
+    Color::white(),
+    Color::blue(),
+    Color::yellow(),
+    Color::purple(),
+    Color::green(),
+    Color::red(),
+    Color::magenta(),
+    Color::orange(),
+    Color::black(),
+};
+
+static void claim(__FILE* x) {
+    (void)x;
+};
+
+static void cls() {
+    painter.fill_rectangle({0, 0, portapack::display.width(), portapack::display.height()}, Color::black());
+};
+
+static void background(int color) {
+    bg_color = color;
+};
+
+static void set_orientation(int x) {
+    (void)x;
+};
+
+static void set_font(unsigned char* x) {
+    (void)x;
+};
+
+static void fillrect(int x1, int y1, int x2, int y2, int color) {
+    painter.fill_rectangle({x1, y1, x2 - x1, y2 - y1}, pp_colors[color]);
+};
+
+static void rect(int x1, int y1, int x2, int y2, int color) {
+    painter.draw_rectangle({x1, y1, x2 - x1, y2 - y1}, pp_colors[color]);
+};
+
+#endif /*__UI_SPI_TFT_ILI9341_H__*/