Move tests, add applicaiton tests. (#1031)

Co-authored-by: kallanreed <kallanreed@outlook.com>

firmware/test/CMakeLists.txt

@@ -0,0 +1,30 @@
+# Copyright (C) 2023 Bernd Herzog, Kyle Reed
+#
+# This file is part of PortaPack.
+#
+# This program 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 2, or (at your option)
+# any later version.
+#
+# This program 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 this program; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+project(tests)
+
+set(DOCTESTINC ${PROJECT_SOURCE_DIR}/include)
+
+enable_testing()
+add_subdirectory(application)
+add_subdirectory(baseband)
+
+add_custom_target(build_tests)
+add_dependencies(build_tests application_test baseband_test)