Automate monitoring of all manufacturers

[AirLoren]

Monitoring of all manufacturers webpages could be automated with GH actions to :

• run spiders to regularly check for new PDFs to analyse and launch parsers if needed
• run generate-gh-pr.py to generate Pull Requests for new devices to add to the database

Warning : Some improvement could be needed on enerate-gh-pr.py as it was not tested since Novembre 2021.