feat: Introduce testing with Unity

[TheRealArthurDent]

No description provided.

[github-actions]

Cpp-Linter Report ⚠️

Some files did not pass the configured checks!

clang-format reports: 1 file(s) not formatted

• test/dummy-test.cpp

clang-tidy reports: 4 concern(s)

• test/dummy-test.cpp:1:10: error: [clang-diagnostic-error]

  'unity.h' file not found

  #include <unity.h>
           ^

• test/dummy-test.cpp:3:12: warning: [modernize-redundant-void-arg]

  redundant void argument list in function definition

  void setUp(void)
             ^~~~

• test/dummy-test.cpp:8:15: warning: [modernize-redundant-void-arg]

  redundant void argument list in function definition

  void tearDown(void)
                ^~~~

• test/dummy-test.cpp:23:5: warning: [modernize-use-trailing-return-type]

  use a trailing return type for this function

  int main(int argc, char **argv)
  ~~~ ^
  auto                            -> int

Have any feedback or feature suggestions? Share it here.