TODO before merging

- [ ] fix tests
- [x] fix linting errors
- [ ] fast-specific .gitignore
- [ ] YAML samples thingy
- [ ] stages README
- [ ] proper docstring on new tools
- [x] modify github actions for different fast tfdoc usage
- [ ] add roadmap to top-level fast README
- [ ] update modules references to local paths
  - [x] stage 00 (ludo)
  - [ ] stage 01 (julio)
  - [ ] stage 02-net (simo)
  - [x] stage 02-sec (ludo)
  - [ ] stage 03-pf (simo)