[FL-2052] New build system based on scons (#1269)

applications/unit_tests/application.fam

@@ -0,0 +1,18 @@
+App(
+    appid="unit_tests",
+    apptype=FlipperAppType.STARTUP,
+    entry_point="unit_tests_on_system_start",
+    cdefines=["APP_UNIT_TESTS"],
+    provides=["delay_test"],
+    order=100,
+)
+
+App(
+    appid="delay_test",
+    name="Delay Test",
+    apptype=FlipperAppType.DEBUG,
+    entry_point="delay_test_app",
+    stack_size=1 * 1024,
+    requires=["unit_tests"],
+    order=110,
+)