LibCore: Put all classes in the Core namespace and remove the leading C

I've been wanting to do this for a long time. It's time we start being
consistent about how this stuff works.

The new convention is:

- "LibFoo" is a userspace library that provides the "Foo" namespace.

That's it :^) This was pretty tedious to convert and I didn't even
start on LibGUI yet. But it's coming up next.

1 files changed, 1 insertions, 1 deletions

diff --git a/Userland/useradd.cpp b/Userland/useradd.cpp
index ef5e51b427..6e9a4b8493 100644
--- a/Userland/useradd.cpp
+++ b/Userland/useradd.cpp
@@ -46,7 +46,7 @@ int main(int argc, char** argv)
     const char* gecos = "";
     const char* username = nullptr;
 
-    CArgsParser args_parser;
+    Core::ArgsParser args_parser;
     args_parser.add_option(home_path, "Home directory for the new user", "home-dir", 'd', "path");
     args_parser.add_option(uid, "User ID (uid) for the new user", "uid", 'u', "uid");
     args_parser.add_option(gid, "Group ID (gid) for the new user", "gid", 'g', "gid");