[Training] Suggest possible training resources page revamps

Proposal

To suggest possible redesigns for the training resources page within the community portal.

Current issues:

• no curation of content: page simply lists resources made by the Tor Project and community members
• absent timestamps (dates created, updated, etc.);
• absent filtering: resources in multiple languages are bundled together, etc.

Additionally, each resource could have:

• tags (e.g. "Tor Browser", "Tor Mobile", "Relays", "Tails"), which would aid in filtering;
• a separate sub-page which could house details such as: learning objectives, time estimate for training delivery, further reading suggestions, etc.

As well, some of the resources listed are in formats other than presentation decks, this includes: guides, zines, and long-reads. For example:

• [guide] https://freedom.press/training/-depth-guide-choosing-web-browser/
• [kit] https://cpj.org/2019/07/digital-safety-kit-journalists/
• [zine] https://www.derechosdigitales.org/wp-content/uploads/que-no-quede-huella.pdf