refactor(userspace/apps/test): ♻️ move all functions in one file

it's just too much...

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

Userspace/apps/test/libc_test/assert.c

@@ -0,0 +1,32 @@
+/*
+	This file is part of Fennix Userspace.
+
+	Fennix Userspace is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix Userspace is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix Userspace. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <assert.h>
+
+/* https://pubs.opengroup.org/onlinepubs/9799919799/functions/assert.html */
+
+int test_assert(void)
+{
+	assert(1 == 1);
+#define A 1
+#define B 2
+	assert(A != B);
+	assert((A == 1) && (B == 2));
+	assert(1);
+	assert(!0);
+	return 0;
+}