refactor: rule type

[0xtekgrinder]

fixed #92

This PR propose a new simpler implementation of LintRule to create a new rule easier than before.

ps: be harsh with the PR to have some good foundations to build upon

[0xtekgrinder]

MMh, in local I don't have problems with the test with race command, do you have any idea on where it could come from and how could I fix it @notJoon ?

[notJoon]

@0xtekgrinder

It seems a race condition occurred in the captureOutput() function when other tests accessed this output buffer (possibly via fmt.Println?) while replacing the global variable os.Stdout.

The simplest solution would be to remove t.Parallel in the tests calling this capture function to run them sequentially. Alternative approaches include adding a mutex to the capture function or modifying it to use separate Write buffers for each test.