tests: split into separate binaries

test/meson.build

@@ -10,19 +10,10 @@ test_dep = [
 
 test_src = files(
     'main.cpp',
-    'JsonParser.cpp',
-    'SafeSignal.cpp',
     'config.cpp',
-    'css_reload_helper.cpp',
     '../src/config.cpp',
-    '../src/util/css_reload_helper.cpp',
 )
 
-if tz_dep.found()
-  test_dep += tz_dep
-  test_src += files('date.cpp')
-endif
-
 waybar_test = executable(
     'waybar_test',
     test_src,
@@ -36,4 +27,5 @@ test(
     workdir: meson.project_source_root(),
 )
 
+subdir('utils')
 subdir('hyprland')