LibGUI: Make `Application`'s construction fallible

The pattern to construct `Application` was to use the `try_create`
method from the `C_OBJECT` macro. While being safe from an OOM
perspective, this method doesn't propagate errors from the constructor.
This patch make `Application` use the `C_OBJECT_ABSTRACT` and manually
define a `create` method that can bubble up errors from the
construction stage.

This commit also removes the ability to use `argc` and `argv` to
create an `Application`, only `Main`'s `Arguments` can be used.

From a user point of view, the patch renames `try_create` => `create`,
hence the huge number of modified files.

1 files changed, 1 insertions, 1 deletions

diff --git a/Userland/Games/FlappyBug/main.cpp b/Userland/Games/FlappyBug/main.cpp
index 245b7afc82..e390aec4e9 100644
--- a/Userland/Games/FlappyBug/main.cpp
+++ b/Userland/Games/FlappyBug/main.cpp
@@ -21,7 +21,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
     TRY(Core::System::pledge("stdio rpath recvfd sendfd unix"));
 
-    auto app = TRY(GUI::Application::try_create(arguments));
+    auto app = TRY(GUI::Application::create(arguments));
 
     Config::pledge_domain("FlappyBug");