[FL-3629] fbt: reworked assets & resources handling (#3160)

* fbt: reworking targets & assets handling WIP
* fbt: dist fixes
* fbt: moved SD card resources to owning apps
* unit_tests: moved resources to app folder
* github: updated unit_tests paths
* github: packaging fixes
* unit_tests: fixes
* fbt: assets: internal cleanup
* fbt: reworked assets handling
* github: unit_tests: reintroducing fixes
* minor cleanup
* fbt: naming changes to reflect private nature of scons tools
* fbt: resources: fixed dist archive paths
* docs: updated paths
* docs: updated more paths
* docs: included "resources" parameter in app manifest docs; updated assets readme
* updated gitignore for assets
* github: updated action versions
* unit_tests: restored timeout; scripts: assets: logging changes
* gh: don't upload desktop animations for unit test run

Co-authored-by: あく <alleteam@gmail.com>

targets/f7/src/dfu.c

@@ -0,0 +1,39 @@
+#include <furi.h>
+#include <furi_hal.h>
+#include <flipper.h>
+#include <alt_boot.h>
+#include <assets_icons.h>
+#include <toolbox/compress.h>
+#include <gui/canvas.h>
+#include <gui/canvas_i.h>
+
+void flipper_boot_dfu_show_splash() {
+    // Initialize
+    Canvas* canvas = canvas_init();
+
+    canvas_set_color(canvas, ColorBlack);
+    canvas_set_font(canvas, FontPrimary);
+
+    canvas_draw_icon(canvas, 0, 64 - 50, &I_DFU_128x50);
+    canvas_draw_str(canvas, 2, 8, "Update & Recovery Mode");
+    canvas_draw_str(canvas, 2, 21, "DFU Started");
+    canvas_commit(canvas);
+
+    canvas_free(canvas);
+}
+
+void flipper_boot_dfu_exec() {
+    // Show DFU splashscreen
+    flipper_boot_dfu_show_splash();
+
+    // Errata 2.2.9, Flash OPTVERR flag is always set after system reset
+    WRITE_REG(FLASH->SR, FLASH_SR_OPTVERR);
+
+    // Cleanup before jumping to DFU
+    furi_hal_deinit_early();
+
+    // Remap memory to system bootloader
+    LL_SYSCFG_SetRemapMemory(LL_SYSCFG_REMAP_SYSTEMFLASH);
+    // Jump
+    furi_hal_switch(0x0);
+}