Add funding to the readme and add funding file

[dingo-d]

For the FUNDING.yml file, I'm not 100% sure if we can link to the specific subpage, or will this work only with

open_collective: thewpcc

[jrfnl]

@dingo-d Looking good, just one small suggestion.

[jrfnl]

If we're not sure if this will work, what about using the custom: LINK1 format ? That should work for sure.

Ref: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/displaying-a-sponsor-button-in-your-repository

[dingo-d]

Yeah, I was thinking about that. Should I leave the open collective link to point to the thewpcc, and add the custom link?

[jrfnl]

As a general question: should there be a "This project needs funding" banner or something near the top of the README for visibility ?

[GaryJones]

✅

[jrfnl]

Left a few nitpick comments, but looking good.
Q: Should the section be added to the table of contents ?

@GaryJones As the PR has changed substantially, do you want to take another look ?

[dingo-d]

Q: Should the section be added to the table of contents?

I don't think so, not sure if it's relevant for some SEO purposes, but it's at the top of the readme, so it's pretty visible, no?

[jrfnl]

@GaryJones Could you please have another look (as the PR has changed significantly) ? If okay, please feel free to merge.