tests: [WIP] add unit tests for some of the instructions

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

tests/meson.build

@@ -0,0 +1,19 @@
+tests_deps = [
+  lib
+]
+
+tests_sources = files()
+
+subdir('cpu')
+
+catch2 = dependency('catch2-with-main', version: '>=3.4.0', static: true)
+catch2_tests = executable(
+  meson.project_name() + '_tests',
+  tests_sources,
+  dependencies: catch2,
+  link_with: tests_deps,
+  include_directories: inc,
+  build_by_default: false
+)
+
+test('catch2 tests', catch2_tests)