Get sustainable funding

In pursuit of securing the financial sustainability of the project and accelerate development we'd really benefit from getting funding one way or another.

Avenues:

- Research grants
- The most likely source that I can imagine right now in the projects current shape and focus. We should ask the SSB people who seem to have extensive experience with this.
- Open source grants:
- [x] [FUUG.fi](https://fuug.fi), see #343
- Donations from users
- The only source right now, unsatisfactory as it only barely covers current costs (not including development costs).
- Consulting
- Similar to the model used by Syncthing. Helping companies use ActivityWatch.
- Building an enterprise-focused version
- Similar to the model used by GitLab. Might follow consulting efforts, we've developed a basic business plan in a course I took but not sure how good it is.
- Raise money from investors
- We'd need to develop a better business plan for this.

Related to #236