Change top-level README to use dynamically generated lists

[rphair]

Last step in implementing #883.

Before reviewing, please read (and perhaps comment on) description of the PR state tagging vocabulary that was applied through the whole PR queue this week: https://github.com/cardano-foundation/CIPs/wiki/301.-State-tagging

1 - The lists of candidate CIPs and CPSs can no longer be sorted by the candidate CIP number as they were in the manually generated tables. Interestingly, GitHub cannot do this. This is a toss-up: maybe before it was easier to find a particular proposal & now it's easiest to find the oldest or newest proposals (plus the user can change to a different sort ordering if they want, add more search terms, etc.).

2 - If any wrong items show up on these dynamically generated lists, it means somehow a preposterous set of tags has been applied. Some care is applied to the queries to prevent this in many cases (i.e. filtering out any "administrative" tagged proposals, even though they generally are not supposed to have a "state" in the review process).

3 - The deleted lists had many likely-abandoned proposals even after I made regular cullings of closed proposals. The list of "actively reviewed" CIP/CPS PRs is actually quite small & manageable. Likewise the total PR queue will be rather small once the "Stalled" proposals are either closed or the current & ongoing attention causes the authors to revive and progress them (I will be happy either way).

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(updated README rendered in branch: changes begin here)

[Ryun1]

I think this a awesome change
Providing more clarity to proposers AND reducing editor overhead 🤝

description of the PR state tagging vocabulary that was applied through the whole PR queue this week: https://github.com/cardano-foundation/CIPs/wiki/301.-State-tagging

This is pretty damn good, I have very little to be able to add on this

The lists of candidate CIPs and CPSs can no longer be sorted by the candidate CIP number as they were in the manually generated tables

I feel like this is fine, considering the benefits that using these state labels brings

[Crypto2099]

Very good idea!

[rphair]

@Ryun1 @Crypto2099 @KtorZ one last idea (for a future PR, since we should agree on the language how it's presented): I believe it would help to have a link to the Update proposals before the "Stalled" section, since people who follow the body of CIPs would be interested in following that. ... p.s. done in #891