Changes to the affiliation policy

[caterina-doglioni]

This PR adds changes to the projects and affiliation pages that were mentioned in an email to the SG, namely:

• Change the "Tiers" wording with respect to the original EVERSE one to reflect comments made by @graeme-a-stewart
• Mentioned that the affiliated projects decide their software category by themselves (minor doubt: what if the reviewers don't agree? Should we have a light-touch review of this?)
• Turn the differential criteria for software of different tiers into desirable criteria that is not necessary for affiliation
• Add mentions and contextualisation page for connections to ICFA and EVERSE
• Soften the "number of developers" criteria

I'd be very happy to have comments on the wording and text, we can also discuss this at the next SG before merging.

Tagging @roiser @graeme-a-stewart @eduardo-rodrigues for a read and a review.

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[eduardo-rodrigues]

Hello @caterina-doglioni, and thank you very much!

I see that you did not work atop my other PR #1918 on the updates to the affiliation programme. I will see if I can rebase/"merge" but otherwise we can review and in the end merge together.

Agreed that we can leave the PRs open since it is easy enough to use the preview to check the new version, when diffs are non-obvious sometimes.

[eduardo-rodrigues]

Good morning @caterina-doglioni, I went ahead and committed my suggestions since nobody complained in several days :).

[caterina-doglioni]

Great, thanks! I should have 1h or so this afternoon to get your changes in as well (unless you've done that already, haven't checked :) )

[eduardo-rodrigues]

Thank you again very much for this important and great update!

[eduardo-rodrigues]

Hello @caterina-doglioni, indeed I went ahead and implemented my little suggestions, and merged. They were basically additions of links. See if OK with you. Otherwise there are 2 trivial things, up to you.

In any case, as per the SG discussions, this important update is now approved. Merge when done/happy.

Thank you to everyone who contributed!

[eduardo-rodrigues]

Morning @caterina-doglioni, I caught a wrong link and fixed it with the suggestion above. Have a look at the outstanding suggestions at your earliest convenience and we finalise :).

[eduardo-rodrigues]

I know you are really busy, @caterina-doglioni, but see if you manage to comment on the little outstanding comments and we merge to finalise? Thanks a lot.