Move app/service code from tactility-core to tactility (#14)

* Move app/service code from tactility-core to tactility

* fix formatting

* updated dev docs

app-esp/src/hello_world/hello_world.c

@@ -2,9 +2,7 @@
 #include "services/gui/gui.h"
 #include "services/loader/loader.h"
 
-static void app_show(App app, lv_obj_t* parent) {
-    UNUSED(app);
-
+static void app_show(TT_UNUSED App app, lv_obj_t* parent) {
     lv_obj_t* label = lv_label_create(parent);
     lv_label_set_recolor(label, true);
     lv_obj_set_width(label, 200);

app-esp/src/main.c

@@ -11,7 +11,7 @@ extern const ServiceManifest wifi_service;
 extern const AppManifest wifi_connect_app;
 extern const AppManifest wifi_manage_app;
 
-__attribute__((unused)) void app_main(void) {
+TT_UNUSED void app_main(void) {
     static const Config config = {
         /**
          * Auto-select a board based on the ./sdkconfig.board.* file
@@ -29,7 +29,6 @@ __attribute__((unused)) void app_main(void) {
         .auto_start_app_id = NULL
     };
 
-    tt_core_init();
     tt_esp_init(&config);
     tt_init(&config.apps, CONFIG_APPS_LIMIT, &config.services, CONFIG_SERVICES_LIMIT);