replace 🪦 Stickler with strict linter in CI

[reactive-firewall]

Replace sticklerCI features with similar lint checks.

Describe the solution you'd like

• check code-style with various linters including:
  • flake8 checks
  • shellcheck checks
  • GitHub annotations (at-least with PRs)
  • new OPTIONALS
    • markdown linter (optional)
    • yaml-lint (optional)
    • codespell (optional)
    • makefile-linter (optional)

Describe alternatives you've considered

• prefer the style of flake8 (based on PEP-8) over black for python.
• does shellcheck EVEN have an alternative: Not really
• should check if houndCI still works too
• need to check yaml and markdown for options (optional)

Additional context

• critical that git annotations link to some kind of reference docs on errors (even just a web search)

[reactive-firewall]

• python bandit scan