Publish internal documentation for `hh_client --lint` errors, change links in error messages

[fredemmott]

For example, hh_client --lint src/__Private/LintRunCLIEventHandler.hack in HHAST (with a nightly build of hh_client) gets:

Lint[5583] Do not use await in a loop. It almost always incurs non-obvious serial fetching that is easy to miss. See https://fburl.com/awaitinloop for more information. [1]

__Private/LintRunCLIEventHandler.hack:100:7
     98 |
     99 |       /* HHAST_IGNORE_ERROR[DontAwaitInALoop] */
[1] 100 |       await $this->renderLintBlameAsync($error);
    101 |       $result = LintAutoFixResult::SOME_UNFIXED;
    102 |     }