Janet 1.16.1

• Add maclintf - a utility for adding linting messages when inside macros.
• Print source code of offending line on compiler warnings and errors.
• Fix some issues with linting and re-add missing make docs.
• Allow controlling linting with dynamic bindings :lint-warn, :lint-error, and :lint-levels.
• Add -w and -x command line flags to the janet binary to set linting thresholds.
  linting thresholds are as follows:
  • :none - will never be trigger.
  • :relaxed - will only trigger on :relaxed lints.
  • :normal - will trigger on :relaxed and :normal lints.
  • :strict - will trigger on :strict, :normal, and :relaxed lints. This will catch the most issues
    but can be distracting.