[FL-3024] Locale settings (#2137)

* Locale settings
* Time/date format fix
* Locale: add docs, enums for HAL, cleanup.

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

applications/debug/locale_test/application.fam

@@ -0,0 +1,11 @@
+App(
+    appid="locale_test",
+    name="Locale Test",
+    apptype=FlipperAppType.DEBUG,
+    entry_point="locale_test_app",
+    cdefines=["APP_LOCALE"],
+    requires=["gui", "locale"],
+    stack_size=2 * 1024,
+    order=70,
+    fap_category="Debug",
+)

applications/debug/locale_test/locale_test.c

@@ -0,0 +1,102 @@
+#include <furi.h>
+#include <gui/gui.h>
+#include <gui/elements.h>
+#include <gui/view_dispatcher.h>
+#include <gui/modules/dialog_ex.h>
+#include <locale/locale.h>
+
+typedef struct {
+    Gui* gui;
+    ViewDispatcher* view_dispatcher;
+    View* view;
+} LocaleTestApp;
+
+static void locale_test_view_draw_callback(Canvas* canvas, void* _model) {
+    UNUSED(_model);
+
+    // Prepare canvas
+    canvas_set_color(canvas, ColorBlack);
+    canvas_set_font(canvas, FontSecondary);
+
+    FuriString* tmp_string = furi_string_alloc();
+
+    float temp = 25.3f;
+    LocaleMeasurementUnits units = locale_get_measurement_unit();
+    if(units == LocaleMeasurementUnitsMetric) {
+        furi_string_printf(tmp_string, "Temp: %5.1fC", (double)temp);
+    } else {
+        temp = locale_celsius_to_fahrenheit(temp);
+        furi_string_printf(tmp_string, "Temp: %5.1fF", (double)temp);
+    }
+    canvas_draw_str(canvas, 0, 10, furi_string_get_cstr(tmp_string));
+
+    FuriHalRtcDateTime datetime;
+    furi_hal_rtc_get_datetime(&datetime);
+
+    locale_format_time(tmp_string, &datetime, locale_get_time_format(), false);
+    canvas_draw_str(canvas, 0, 25, furi_string_get_cstr(tmp_string));
+
+    locale_format_date(tmp_string, &datetime, locale_get_date_format(), "/");
+    canvas_draw_str(canvas, 0, 40, furi_string_get_cstr(tmp_string));
+
+    furi_string_free(tmp_string);
+}
+
+static bool locale_test_view_input_callback(InputEvent* event, void* context) {
+    UNUSED(event);
+    UNUSED(context);
+    return false;
+}
+
+static uint32_t locale_test_exit(void* context) {
+    UNUSED(context);
+    return VIEW_NONE;
+}
+
+static LocaleTestApp* locale_test_alloc() {
+    LocaleTestApp* app = malloc(sizeof(LocaleTestApp));
+
+    // Gui
+    app->gui = furi_record_open(RECORD_GUI);
+
+    // View dispatcher
+    app->view_dispatcher = view_dispatcher_alloc();
+    view_dispatcher_enable_queue(app->view_dispatcher);
+    view_dispatcher_attach_to_gui(app->view_dispatcher, app->gui, ViewDispatcherTypeFullscreen);
+
+    // Views
+    app->view = view_alloc();
+    view_set_draw_callback(app->view, locale_test_view_draw_callback);
+    view_set_input_callback(app->view, locale_test_view_input_callback);
+
+    view_set_previous_callback(app->view, locale_test_exit);
+    view_dispatcher_add_view(app->view_dispatcher, 0, app->view);
+    view_dispatcher_switch_to_view(app->view_dispatcher, 0);
+
+    return app;
+}
+
+static void locale_test_free(LocaleTestApp* app) {
+    furi_assert(app);
+
+    // Free views
+    view_dispatcher_remove_view(app->view_dispatcher, 0);
+
+    view_free(app->view);
+    view_dispatcher_free(app->view_dispatcher);
+
+    // Close gui record
+    furi_record_close(RECORD_GUI);
+    app->gui = NULL;
+
+    // Free rest
+    free(app);
+}
+
+int32_t locale_test_app(void* p) {
+    UNUSED(p);
+    LocaleTestApp* app = locale_test_alloc();
+    view_dispatcher_run(app->view_dispatcher);
+    locale_test_free(app);
+    return 0;
+}