feat(userspace/apps/test/libc_test): rewrite a lot of the code and improve debugging with vscode using .devcontainer

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

Userspace/apps/test/libc_test/.vscode/launch.json

@@ -27,4 +27,4 @@
 		"preLaunchTask": "run-make"
 	}
 	]
-}
+}

Userspace/apps/test/libc_test/.vscode/tasks.json

@@ -23,4 +23,4 @@
 			}
 		}
 	]
-}
+}